Roasted Zucchini Casserole

An easy cheesy zucchini bake with layers of roasted zucchini, onions, marinara sauce, and pasta baked until bubbly for an delicious summer casserole.

• Preparation Time: 15 mins
• Cooking Time: 1 hr 5 mins
• Total Time: 1 hr 20 mins
• Calories: 240 Calories

Ingredients

• 3 tablespoons olive oil
• salt and ground black pepper to taste
• 1 (16 ounce) package penne pasta
• 2 medium onions, sliced
• 1 (28 ounce) jar marinara sauce
• 3 medium zucchinis, sliced
• 0.5 cup grated Parmesan cheese

Recipe Instructions

Step 1

Preheat the oven to 400 degrees F (200 degrees C).

Step 2

Lightly grease a 9x13-inch baking dish.

Step 3

Toss zucchini and onions in a large bowl with olive oil until evenly coated. Spread vegetables into a large baking dish.

Step 4

Roast in the preheated oven until golden, about 30 minutes. Remove from the oven and season with salt and pepper. Reduce the oven temperature to 350 degrees F (175 degrees C).

Step 5

When the vegetables are almost finished roasting, bring a large pot of lightly salted water to a boil. Add pasta and cook, stirring occasionally, until tender yet firm to the bite, about 11 minutes; drain.

Step 6

Heat marinara sauce in a saucepan over medium heat until hot. Spread hot sauce into the prepared baking dish. Top with cooked pasta, followed by roasted zucchini and onions. Sprinkle with Parmesan cheese.

Step 7

Bake in the preheated oven until sauce is bubbly, 35 to 40 minutes. Remove from the oven and let rest for a few minutes before serving.