Slow-Cooker Baked Ziti | America's Test Kitchen

Ingredients

• 2 tablespoons olive oil
• 1 pound hot or sweet Italian sausage , casings removed
• 1 onion , chopped
• 3 garlic cloves , minced
• 1/2 teaspoon dried oregano
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 8 ounces (2 1/2 cups) ziti
• 1 (28-ounce) can crushed tomatoes
• 1 (15-ounce) can tomato sauce
• 8 ounces (1 cup) whole-milk ricotta cheese
• 4 ounces mozzarella cheese , shredded (1 cup)
• 2 tablespoons thinly sliced fresh basil