Baked Smoked Sausage Spaghetti Casserole

Name: Baked Smoked Sausage Spaghetti Casserole
Ingredients: 1 package (13.5 ounces) Johnsonville Smoked Split Rope Sausage, sliced; 1 pound spaghetti, cooked according to package directions; 1 medium onion, chopped; 2 garlic cloves, minced; 2 teaspoons olive oil; 1 medium green bell pepper, diced; 1 package (8 ounces) sliced mushrooms; ½ teaspoon seasoned salt; ½ teaspoon Italian seasoning; 1 can (28 ounces) crushed tomatoes; ¾ cup water; 1 cup basil leaves, coarsely chopped; 1 cup shredded Cheddar cheese, divided