One-Pot Baked Ziti with Sausage and Spinach | America's Test Kitchen

Ingredients

• 8 ounces sweet Italian sausage , casings removed
• 3 garlic cloves , minced
• 1 (28-ounce) can tomato sauce
• 1 (14.5-ounce) can diced tomatoes
• 3/4 teaspoon salt
• 1/2 teaspoon dried oregano
• 1/2 teaspoon sugar
• 1/8 teaspoon red pepper flakes
• 2 cups water
• 12 ounces (3 3/4 cups) ziti
• 6 tablespoons chopped fresh basil
• 7 ounces (7 cups) baby spinach , chopped coarse
• 6 ounces whole-milk mozzarella cheese, cut into 1/4-inch pieces (1 1/2 cups)
• 2 ounces Parmesan cheese , grated (1 cup)
• 8 ounces (1 cup) whole-milk ricotta cheese