Easy Italian Sausage Spaghetti

Ingredients (15)

• ✓ 1 tablespoon olive oil
• + 2 pounds sweet Italian sausage add to pantry
• + 1 pound fresh mushrooms, sliced add to pantry
• + 1 onion, chopped add to pantry
• + 1 green bell pepper, chopped add to pantry
• + 1 tablespoon minced garlic add to pantry
• + 2 (28 ounce) cans tomato sauce add to pantry
• + 2 tomatoes, diced add to pantry
• + 1 (6 ounce) can tomato paste add to pantry
• + 1 (6 ounce) can sliced black olives, drained add to pantry
• ✓ 1 teaspoon dried oregano, or to taste
• + 1 teaspoon dried basil, or to taste add to pantry
• ✓ salt to taste
• + 1 (16 ounce) package spaghetti, or as needed add to pantry
• + ¼ cup grated Parmesan cheese, or to taste add to pantry