Sausage Lasagna in a Pan

Ingredients

• 3 (14.5-ounce) cans whole peeled tomatoes
• 2 tablespoons extra-virgin olive oil
• 1 onion, chopped fine
• Salt
• pepper
• 3 garlic cloves, minced
• 1/4 teaspoon red pepper flakes
• 1 pound hot or sweet Italian sausage, casings removed
• 12 ounces (1 1/2 cups) whole-milk ricotta cheese
• 1 large egg yolk
• 1 teaspoon minced fresh thyme or
• 1/4 teaspoon dried
• 8 ounces mozzarella cheese, shredded (2 cups)
• 1/4 cup grated Parmesan cheese
• 12 no-boil lasagna noodles, broken in half
• 3 tablespoons chopped fresh basil