Ingredients
2 tablespoons extra-virgin olive oil
1 sweet onion, diced
3 garlic cloves, minced
1 pound ground Italian sausage
One 16-ounce jar marinara sauce
1 pound rigatoni pasta
½ cup grated Parmesan cheese
8 ounces shredded mozzarella cheese
2 large eggs, room temperature
1 teaspoon vanilla extract
1 cup (240ml) buttermilk