Ratatouille Fettuccine Alfredo

Name: Ratatouille Fettuccine Alfredo
Ingredients: cooking spray; 1 tablespoon olive oil; 1 eggplant, diced; 1/2 cup onion, chopped; 6 cloves garlic, minced; 1 (14.5 ounce) can diced tomatoes; 1 zucchini, peeled and diced; 1 yellow squash, diced; 1/2 cup chopped fresh mushrooms; 1/2 cup chopped green bell pepper; 1 tablespoon dried Italian seasoning; salt and ground black pepper to taste; 1 (12 ounce) package dry fettuccine pasta; 1 (16 ounce) jar Alfredo sauce; 1 cup canned pumpkin puree; 1 cup shredded mozzarella cheese