Best Spaghetti Squash Lasagna

Ingredients (16)

• + 1 large spaghetti squash, halved and seeded add to pantry
• + 1 tablespoon olive oil, or as needed add to pantry
• + 1 cup chopped onion add to pantry
• ✓ 5 cloves garlic, minced
• + 1 pound bulk pork sausage add to pantry
• + 2 tablespoons Worcestershire sauce add to pantry
• ✓ 1 tablespoon Italian seasoning, or more to taste
• + 2 teaspoons salt, divided add to pantry
• + 1 (28 ounce) can Italian crushed tomatoes add to pantry
• + 4 tablespoons Marsala wine add to pantry
• + 28 ounces ricotta cheese add to pantry
• ✓ ½ cup shredded Parmesan cheese
• + 3 sprigs fresh basil, leaves stripped from stems add to pantry
• + 1 teaspoon ground black pepper add to pantry
• + 1 (16 ounce) package sliced fresh mozzarella cheese add to pantry
• + 2 tablespoons thinly sliced fresh basil leaves, or to taste add to pantry