Yes, you can absolutely add additional ingredients like sausage or vegetables to customize the flavor and texture. Sausage can add a delicious smoky or savory element to the dish, while vegetables like bell peppers, onions, or carrots can provide extra flavor and nutritional value. If you choose to add sausage, cook it separately before adding it to the baked beans. For vegetables, you can sauté them in the Instant Pot before adding the cooked beans or simply add them along with the other ingredients. Adjust the cooking time as needed to ensure all the ingredients are cooked to your desired doneness. Feel free to experiment and get creative with the ingredients to make the baked beans uniquely your own.