Vegetables, fruits: to root tip, mushrooms, juice less, hard texture of fruits and vegetables mainly, such as corn, green peppers, pineapple, bananas and so on.
Seafood: everything is OK, but be sure to choose fresh ones.
Beef: beef ribs can be chosen, fresh and tough, the beef shoulder is the most conducive to the cooked tender meat.
Pork ribs, waist and buttocks: should be fresh and slightly some fat pork, roast the meat that is not too dry.