A gif of uncooked ratatouille and roasted ratatouille.
A plate of pasta tossed with roasted ratatouille.

Last Friday, before heading out to see friends for a long weekend, I made the roasted ratatouille from my friend Gena Hamshaw’s Food52 Vegan. I chopped up every pepper, onion, eggplant, tomato, and zucchini I could find, threw them into my largest roasting pan, tossed them with olive oil, white balsamic vinegar, fresh thyme, and salt, and cooked them till they released their juices and melted into a stewy mix.

That evening, I tossed the ratatouille, as Gena suggests, with pasta, then packed up what remained for the road. My friends and I at the ratatouille all weekend, cold straight from the fridge for lunch, spread over grilled bread before dinner.

What I love about this ratatouille’s flavor is the subtle bite lent by the balsamic vinegar, which evokes eggplant caponata though the sharpness here is more mellow. It is irresistible.

What I also love about this roasted ratatouille is how unfussy and forgiving it is. In the notes, Gena writes: “Traditional ratatouille can be a little high maintenance: It simmers on the stovetop for an hour or longer and often requires adding specific vegetables at specific times.” With roasting, on the other hand, all of the vegetables and seasonings enter the pan at once.

With the exception of a quick stir halfway through cooking, the process is hands off—there’s no sautéing, no (vigilant) monitoring, no staggering the entry of the vegetables. When the vegetables release their juices, and when those juices then reduce down into a thick, stewy mix, it’s done.

A board of vegetables.
A board with chopped vegetables for ratatouille on top.
A bowl of olive oil, white balsamic vinegar, and thyme.
A roasting pan filled with raw, chopped vegetables.
A roasting pan with roasted ratatouille
A medium pot with pasta, roasted ratatouille, parmesan and basil.
A bowl of roasted ratatouille pasta.
Quart containers filled with ratatouille.
An open quart container packed with roasted ratatouille.
A quart container packed with roasted ratatouille.
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A bowl of roasted ratatouille pasta.

Roasted Ratatouille = The Best Ratatouille

  • Author: Alexandra Stafford
  • Prep Time: 20 minutes
  • Cook Time: 1 to 2 hours (or more)
  • Total Time: Varies: 1 to 3 hours
  • Yield: Varies: 1 to 3 quarts


This is adapted from Food52 Vegan by Gena Hamshaw.

Use this recipe as a guide: It’s best to use a balanced mix of vegetables, but the roasting process is forgiving. For instance, I’ve made this with and without zucchini; I’ve used a mix of vegetables that leans heavy on the eggplant at times and heavy on the tomatoes at others. I’ve used all sorts of peppers, tomatoes, eggplant, etc.

Also, I often make a quadruple (or more!) recipe, so don’t be afraid to load up your largest roasting pan. The key is to be patient with the roasting. Let the vegetables cook until the liquids reduce, and the mixture becomes thick and stewy. When I double/triple/quadruple the recipe, I scale the dressing as needed. Most recently, when my roasting pan was completely loaded, I used 1 cup olive oil and 1/2 cup white balsamic vinegar, and I cooked the vegetables for 2 to 3 hours.

If you’re feeling lazy, you can omit the thyme altogether or toss the sprigs with the vegetables before roasting (as opposed to chopping the leaves), and extract the sprigs afterwards.


For the roasted ratatouille:

  • 12 ounces eggplant, (about 1), chopped into 1-inch pieces, see notes above re quantities
  • 1 1/4 pounds tomatoes, chopped into 1-inch pieces
  • 12 ounces zucchini (about 2), chopped into 1-inch pieces
  • red bell (or other) peppers, seeded and coarsely chopped
  • yellow or white onion, chopped
  • shallot, thinly sliced
  • cloves garlic, minced
  • 1/4 to 1/2 cups olive oil, see notes above
  • 2 to 4 tablespoons balsamic vinegar (I prefer white)
  • teaspoons chopped fresh thyme
  • teaspoon kosher salt plus more to taste
  • Freshly cracked pepper to taste
  • 1/4 to 1/2 cups thinly sliced fresh basil and/or parsley, optional

For the pasta:

  • dried pasta
  • roasted ratatouille
  • freshly grated parmesan
  • basil


  1. Preheat the oven to 400° F.
  2. In a large roasting pan or casserole, combine the tomatoes, eggplant, zucchini, peppers, onion, shallot, and garlic. Note: I add the vegetables to the pan as I finish chopping them, and sprinkling each layer of vegetables lightly with salt.
  3. In a small bowl or measuring cup, whisk together the olive oil, vinegar, thyme, and 1 teaspoon kosher salt. Pour over the vegetables. Toss to coat. Season with pepper.
  4. Bake for 30 minutes, then stir well. Bake for another 30 to 45 minutes (or even longer, especially if you’ve increased the quantities: if my roasting pan is really loaded, I roast the vegetables for at least 2 hours or until the juices really begin to reduce/thicken) until the vegetables are all very tender and the released juices are beginning to thicken. Taste and adjust seasoning with more salt and pepper as desired. Stir in basil, if using.
  5. To serve, spoon over toast or toss with cooked pasta, grated parmesan, finely chopped basil and enough of the reserved pasta cooking liquid to make a nice sauce. Yum.
  • Category: Vegetable
  • Method: Roasted
  • Cuisine: French

Keywords: ratatouille, summer, vegetables, zucchini, eggplant, squash, onions, garlic, bell, peppers, garlic, olive oil, surplus, bounty, vegan