Layered Baked Polenta with Roasted Vegetables and Parmesan

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A comforting baked polenta dish layered with tender roasted vegetables and a golden Parmesan crust, perfect for a hearty vegetarian meal. This mediterranean-inspired vegetarian (vegetarian) ready in about 70 minutes pairs polenta (coarse cornmeal), water, salt for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 4, 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: 55 min Serves 4 Mediterranean cuisine 320 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat the oven to 425°F. Toss 1 sliced medium zucchini, 1 sliced medium red bell pepper, 1 sliced small red onion, 3 tbsp olive oil, 3 minced garlic cloves, 1 tbsp fresh thyme leaves, and 1/2 tsp freshly ground black pepper in a bowl until well coated. Spread the vegetables on a baking sheet and roast for 20 minutes until tender and lightly caramelized.
  2. Step 2: While vegetables roast, bring 4 cups water and 1 tsp salt to a boil in a medium saucepan. Gradually whisk in 1 cup polenta over medium heat to avoid lumps. Reduce heat to low and cook, stirring frequently, for 25-30 minutes until thick and creamy.
  3. Step 3: Stir 1/2 cup grated Parmesan cheese into the cooked polenta, then spread half of the polenta evenly in a greased 9-inch square baking dish. Layer the roasted vegetables evenly over the polenta, then cover with the remaining polenta. Sprinkle the top with the remaining 1/4 cup Parmesan cheese.
  4. Step 4: Bake the assembled polenta dish at 400°F for 20 minutes until the top is golden and set. Let cool for 5 minutes before slicing and serving.

Equipment for this recipe

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Frequently asked questions

How long does Layered Baked Polenta with Roasted Vegetables and Parmesan take to make?

Total time is about 70 minutes (15 min prep + 55 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 Layered Baked Polenta with Roasted Vegetables and Parmesan?

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 polenta (coarse cornmeal) from drying out.

Can I substitute ingredients in Layered Baked Polenta with Roasted Vegetables and Parmesan?

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 Layered Baked Polenta with Roasted Vegetables and Parmesan for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). 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 Layered Baked Polenta with Roasted Vegetables and Parmesan vegetarian?

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