Zucchini and Tomato Sheet Pan Ratatouille with Fresh Thyme

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

An easy, rustic ratatouille featuring zucchini and ripe summer tomatoes roasted on a sheet pan with fragrant fresh thyme and garlic. This french-inspired vegetarian (gluten free) ready in about 45 minutes pairs large, diced red bell pepper, medium, thinly sliced yellow onion, thinly sliced garlic cloves for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 120 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 30 min Serves 6 French cuisine 120 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 425°F. On a large sheet pan, spread 2 sliced medium zucchinis (1/2-inch rounds), 3 large ripe tomatoes cut into 1-inch chunks, 1 large diced red bell pepper, and 1 medium thinly sliced yellow onion evenly.
  2. Step 2: Drizzle 3 tbsp extra virgin olive oil over the vegetables, then scatter 4 thinly sliced garlic cloves and 4 fresh thyme sprigs on top. Season with 1 1/2 tsp sea salt and 3/4 tsp freshly ground black pepper.
  3. Step 3: Toss everything gently with your hands to coat evenly and arrange in a single layer.
  4. Step 4: Roast in the preheated oven for 25-30 minutes, stirring halfway through, until vegetables are tender and edges start to caramelize.
  5. Step 5: Remove from oven and drizzle with 1 tbsp balsamic vinegar, tossing once more before serving warm as a vibrant summer vegetable side.

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Frequently asked questions

How long does Zucchini and Tomato Sheet Pan Ratatouille with Fresh Thyme take to make?

Total time is about 45 minutes (15 min prep + 30 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Zucchini and Tomato Sheet Pan Ratatouille with Fresh Thyme?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep large, diced red bell pepper from drying out.

Can I substitute ingredients in Zucchini and Tomato Sheet Pan Ratatouille with Fresh Thyme?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Zucchini and Tomato Sheet Pan Ratatouille with Fresh Thyme for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Zucchini and Tomato Sheet Pan Ratatouille with Fresh Thyme gluten free?

Yes — this recipe is tagged gluten free based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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