These are appropriately called fat-burning foods. When they are introduced to recipes, the result is to lower the overall fat calories that are absorbed by the body. Examples are celery, strawberry, oats, wheat, apple, broccoli, spinach, and tomato. For example, chop up celery in your favorite casserole or add a layer of spinach in the meatloaf before you roll it into the pan. Add peas to the tuna casserole and beans to your chili or soup.
Beans are great fat-burners.
Peppers and mustard are two ingredients that speed up metabolism in digestion. Add fiber to recipes. It's long been a known fact that cholesterol attaches to fiber and is expelled from the body before it has the opportunity to be absorbed into the blood stream. When converting recipes, remember to make choices that increase fiber. For example, choose wheat flour over white when baking.