Instant Pot Cajun 15 Bean Soup Recipe is packed full of the spicy flavors of your favorite Cajun recipes. Cajun 15 Bean soup is a recipe you definitely don’t want to miss. This easy no-soak 15 bean Instant Pot soup recipe is ridiculously easy to make and is done in under an hour from start to finish. Packed full of spicy flavors, diced ham, 15 dried beans, diced tomatoes, onion, garlic, and sweet bell peppers.