Heat oven to 350°F. Spray a 13x9-inch baking pan with nonstick cooking spray.
Scoop out center of zucchini halves. Reserve 1 1/2 cups. Place zucchini boats in baking pan.
In a large skillet over medium-high heat, cook sausage, stirring to crumble, about 6 minutes or until browned. Remove sausage to a medium bowl.
Add onion and garlic to skillet, cook until onion is translucent. Stir in reserved zucchini, sausage, tomatoes, Parmesan cheese, tomato paste, Italian seasoning, salt and black pepper.
Spoon mixture into the zucchini boats.
Bake for 20 minutes. Remove from oven and top with mozzarella cheese.
Bake an additional 5 to 6 minutes or until cheese is melted.
Heat oven to 350°F. Spray a 13x9-inch baking pan with nonstick cooking spray.
Scoop out center of zucchini halves. Reserve 1 1/2 cups. Place zucchini boats in baking pan.
In a large skillet over medium-high heat, cook sausage, stirring to crumble, about 6 minutes or until browned. Remove sausage to a medium bowl.
Add onion and garlic to skillet, cook until onion is translucent. Stir in reserved zucchini, sausage, tomatoes, Parmesan cheese, tomato paste, Italian seasoning, salt and black pepper.
Spoon mixture into the zucchini boats.
Bake for 20 minutes. Remove from oven and top with mozzarella cheese.
Bake an additional 5 to 6 minutes or until cheese is melted.