Use medium pasta shells or any other small pasta shape like elbow macaroni or rotini for the best texture. Be sure to scrape the bottom of the Instant Pot before pressure cooking to prevent the burn notice. For extra heat, add cayenne pepper or use a spicy salsa. Leftover pasta absorbs sauce, so add broth or milk when reheating. Ground beef can be swapped for turkey or chicken. Fresh cilantro can be replaced with green onions or parsley. Variations include vegetarian versions, extra veggies, different cheese options, and dairy-free substitutes.