Breadstick and Pizza Casserole

INGREDIENTS:
1 tablespoon olive oil
1 medium onion, chopped
1 bell pepper, green, red or yellow
2 medium zucchini, cut into rounds
2 cloves garlic, chopped
2 cans (14.5 ounces each) diced tomatoes, drained
16 ounces tomato sauce
9-12 ounces fully cooked chicken or turkey sausages, sliced
1/2 teaspoon dried basil
1/2 teaspoon dried oregano
1/4 teaspoon dried thyme
1/2 teaspoon salt
1/2 teaspoon black pepper
1/4 cup grated Parmesan cheese
2 cups shredded mozzarella cheese
1/2 recipe homemade breadstick dough (see note above)
DIRECTIONS:
Preheat the oven to 350 degrees F. Grease a 9X13-inch baking dish and set aside.
In a large non-stick skillet, heat the oil over medium heat. Add the onion and diced pepper. Cook, stirring occasionally, for 4-5 minutes, until the onion is translucent and the pepper is tender. Add the zucchini and garlic. Cook for 2-3 minutes, until just tender. Stir in the drained tomatoes, tomato sauce, chicken sausage, basil, oregano, thyme, salt and pepper. Cook for 5 to 7 minutes until the liquid is somewhat reduced. Add 2 tablespoons Parmesan cheese and stir into the mixture. Spoon half of the sauce mixture into the prepared dish. Sprinkle 1 cup mozzarella cheese over the top. Spoon the other half of the sauce over the top of the cheese and sprinkle another 1/2 cup mozzarella over the top. Arrange bread sticks in a lattice pattern (see pictures below) over the sauce, trimming to fit, if necessary. Sprinkle remaining Parmesan and mozzarella on top.
Bake 25-30 minutes, until the breadsticks are golden brown and cooked through and the filling is hot and bubbly. Let stand 5-10 minutes before serving.