Step 1

Preheat the oven to 450°F.

Step 2

On a baking sheet, toss the bell peppers, zucchini, squash, mushrooms, and onion with the olive oil, 1/2 teaspoon of the salt, 1/4 teaspoon of the pepper, and the herbs. Bake until tender, about 15 -minutes.

Step 3

Bring a large pot of salted water to a boil over high heat. Add the pasta and cook for about 6 minutes. Since you will be cooking the pasta a second time in the oven, you want to make sure it is not completely cooked. Drain in a colander.

Step 4

In a large bowl, combine the pasta with the roasted vegetables, marinara sauce, fontina, mozzarella, 1/4 cup of the Parmesan, the peas, and the remaining 1/2 teaspoon salt and 1/4 teaspoon pepper. Gently mix using a wooden spoon until all the pasta is coated with the sauce and the ingredients are -combined.

Step 5

Pour the pasta into a greased 9 x 13 x 2-inch baking dish. Top with the remaining 1/3 cup of Parmesan cheese and the butter pieces. Bake until the top is golden and the cheese melts, about 25 -minutes.