Here’s a variation of an Engine 2 recipe. Eating grains with beans or lentils is the easiest way to get complete proteins in your diet on a regular basis. Black beans are packed with iron, a mineral that helps transport oxygen throughout the body. Iron absorption is enhanced when paired with acidic foods, so here we've combined beans with tomatoes - a pairing that's sure to please your body and your taste buds. Makes 4-5 servings.