BEAN FILLING: Heat up 1 tablespoon oil in a little saucepan. Add the red onion, ground cumin and chili powder; saute 2 minutes. Add the beans and cook 5 minutes, mashing a few with your spoon. Season with a little salt and pepper. Spoon a small helping over 4 crescent triangles, top with a pinch of cheddar cheese and a few cilantro leaves. Roll up.