Roasted Vegetable Ratatouille

By Sally Cameron on March 13, 2013

Side Dishes, the daniel plan, Vegan, Vegetables, Vegetarian

Friday morning usually finds me shopping at a local farmers market. The vibrant colors, the fresh air, the field-fresh produce are inspiring. This week I met up with a girlfriend. We were planning to cook all day for her daughters birthday party on Saturday. Knowing we would be spending long hours in the kitchen, she asked, what are we going to have for lunch? I was standing at produce tables overflowing with beautiful tiny purple eggplant, colorful sweet peppers, onions, green zucchini and ripe red tomatoes. That’s when inspiration hit for this roasted vegetable ratatouille. I knew she would love it. She did, and you will too.

roasted vegetable ratatouille |

Roasted Vegetable Ratatouille

Bursting with the vibrant colors of fresh vegetables and the flavor of herbs, Ratatouille is a classic vegetable dish from Provence in the South of France. Roasting really brings out the flavor of the vegetables. I like to add whole garlic cloves to the mix, as they get sweet when you roast them. Once prepped, toss it all together with olive oil and plenty of fresh chopped thyme, then roast in the oven.

Sometimes I’ll add dried lavender or Herbs de Provence, a traditional all-purpose dried herb blend of rosemary, fennel, thyme, savory, basil, tarragon, lavender and other herbs. It’s optional, but fun if you love lavender and have never tried cooking with it.

bowl of vegetables

Roasting Vegetables

Roasting vegetables brings out their fantastic flavors and it’s a hands-off technique. While the vegetables are in the oven, work on the rest of your meal. For lunch, I served the Ratatouille over brown rice for a vegan, gluten-free option. It’s also good served with pasta. I use brown rice noodles, but use your favorite kind.

Roasted ratatouille is also good as a side dish for roast chicken or fish. You could even fold the leftovers into an omelet or use them to top crisp, baked crostini spread with goat cheese as an appetizer or snack.

Choosing Vegetables

Although I do not always specify it in my recipes, I choose organic produce as much as I can. If it comes down to eating vegetables or not, organic versus conventional, it’s more important to just eat your vegetables. You decide what is best for your family.

Why I buy organic: I believe organic is healthier because I am consuming less pesticides. It’s also healthier for the environment and the workers who harvest our produce. How can you tell what is organic? Those small, sometimes annoying labels (PLU codes) on fruits and vegetables help. If it is a 4-digit code, it is conventional. If it is a 5-digit code that begins with a 9, it is organic. Not all produce may be marked. Look for a sign that says organic, or ask.

I choose organic bell peppers because they are on the Dirty Dozen list for produce with the highest levels of pesticides. I choose organic zucchini, as squash is on the list of GMO (gentically modified) crops, which are not good for us either. Say no to GMO.

colorful vegetables on a baking sheet

Note on Tools

Rimmed baking sheets – I could not live without rimmed baking sheets in my kitchen. I use the half sheet, quarter sheet and eighth sheet size. I use them for baking, roasting, organizing, as a landing spot and to hold raw proteins and other ingredients when they are in the refrigerator. Find them at the links above on Amazon, or check a restaurant supply, cooking store or store like Bed, Bath & Beyond.

The quarter sheet size will fit all ovens and the half sheet fit most. If you have small or older ovens, measure to be sure they will fit. It you use must use the quarter sheet size, you will need two of the quarter size for a single recipe of ratatouille (to serve 2).

Baking parchment – Here is another handy tool for baking, roasting and many other kitchen uses. I buy packages of pre-cut half sheet size (12″x16″). You can always cut them in half to use on quarter sheet pans. Parchment helps protect food in the oven from direct contact with a hot metal pan and makes pans easier to clean. You can buy rolls at most grocery stores these days, or buy the cut sheets at cooking and restaurant supply stores or online. I’ve included links for Amazon.

Roasted Vegetable Ratatouille

This colorful vegetable dish is inspired by the classic dish from the South of France. Roasting vegetables brings out their wonderful flavors. Serve it as a side dish or over quinoa, brown rice or pasta for a main course dish. You’ll need baking parchment paper to line your baking sheet. It’s available at most grocery stores these days, cooking stores and online. Note – the eggplant I use is called Indian eggplant. They are about the size of a Roma tomato. If you cannot find this variety, use other small eggplants or the long, thin Japanese variety.


  • 1 large red yellow or orange bell pepper
  • 1/2 large onion
  • 6-8 small round Indian eggplants or 1 Japanese eggplant
  • 2 medium zucchini
  • 2-3 large Roma tomatoes
  • 8-10 whole garlic cloves peeled
  • 1 tablespoon fresh chopped thyme leaves
  • 1-2 teaspoons dried lavender or Herbs de Provence optional
  • 1-2 tablespoons extra virgin olive oil
  • Salt and pepper to taste
  • A sprinkle of fresh grated Parmesan cheese optional
  • Tools note – parchment paper and a rimmed baking sheet


  • Pre-heat the oven to 400°F (204 C). Line a half sheet size rimmed baking sheet with parchment paper and set aside.
  • Prep vegetables – Cut all of your vegetables into approximately the same sizes. Don’t cut them too small or they will roast too quickly and risk burning. See photos in the post for a visual reference. Cut the peppers into large chunks about 1 1/2″ square. Cut onion into large chunks
  • If you are using the small Indian eggplant, cut them in quarters top to bottom, and depending on the size, maybe in half crosswise for 8 pieces. If using another variety of eggplant, cut it into small chunks.
  • For zucchini, quarter them lengthwise, then cut into about 5 pieces each.
  • For the tomato, cut into quarters, then across again into 8 pieces.
  • Place all vegetables in a large bowl along with the whole garlic cloves and toss with olive oil and herbs. Spread the vegetables on the parchment-lined rimmed baking sheet and roast in the oven until the vegetables are shriveled and browning at the edges. It will take between 35-45 minutes. Timing will depend on your oven and the size you cut your vegetables. When you smell them, check them. Serve over quinoa, brown rice, noodles or as a side dish.


Serving: 2g
  1. Michelle K - March 13th, 2013

    Looks yummy! Look forward to trying it. I have a “novice” cooking question. We usually use aluminum foil in baking bans (Dan’s favorite) like you are describing using parchment, which we have, but never use. What is the difference/reason for parchment instead of foil? Love your photos and info as usual, thank you.

  2. Sally - March 13th, 2013

    All questions welcome Michelle. Glad you asked. Parchment and foil are often interchangeable. Parchment, in particular, protects food from the direct heat of the bottom of the pan. They both make clean-up easier. Foil is reflective, parchment is not. If you have parchment but don’t use it, now you have a reason to try it and see for yourself. Parchment will absorb some extra moisture and foil will not. Next time I roast a batch I will try two pans side by side, one foil and one parchment. Hard to explain, and maybe just a very small difference, but I like doing vegetables with parchment. If you choose to use neither of them and roast directly on the pan, watch your timing as the vegetables may roast faster. Follow your nose. When you smell them, check them. And you may need to mix and turn them part of the way through roasting. And remember, ovens vary. Hope this helps!

  3. Madonna/aka/Ms. Lemon - March 13th, 2013

    I have been wanting to try those small eggplant. This looks like a delicious lunch or dinner. And, I think I could use some quarter sheets.

  4. Priscilla | ShesCookin - March 14th, 2013

    Hi Sally – that’s what I love about roasted vegetables: so simple, yet sensational (in taste and appearance). Those tiny eggplants are so cute! Gorgeous photos, love how vibrant the colors are.

  5. Sally - March 15th, 2013

    Totally agreed Priscilla! I love to roast vegetables! Once you learn how simple it is to do and how good they taste, you can get your family (or yourself) to eat more vegetables.

  6. kate - June 22nd, 2013

    I made this for my family tonight it was delicious. I was going to have it with quinoa to make it extra healthy but i couldn’t find any in the shop so i used brown rice.
    I especially loved the taste of the egg plant as it absorbed all the herbs like a sponge and thought the roasted red onion and garlic really gave it a tasty kick. The famo loved it. Very nice dish.

  7. Erin - June 30th, 2013

    This is SO delicious. My family loved it! I will definitely be making this again.

    Thank you for the recipe!

  8. Ilke - September 19th, 2013

    I have a guest this weekend and I am set to grill fish , a big Pompano. Have been thinking about side dishes. I am definitely going with this one, on top of my bulgur pilaf and the fish. Simple and saves time. Thank you!

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