Cook (boil, fry or bake) carbohydrate and starchy foods such as pasta, potatoes, rice, corn, cereals and legumes completely and then let them cool down completely. This process turns part of the starch into resistant starch. If you then eat them cold or even warm them up again, the starch will remain in this indigestible state. With an Upfit nutrition plan you get a wide range of dishes that can be precooked and that taste great even when cold!