A buddy of mine wanted me to grill filet mignon for him, he went to the butcher and bought the whole thing, not really understanding what he wanted. So we got 4-5 nice filets and the butcher asked if he wanted the trimmings ground, and he said I guess, he knows little about meat. One night we had the filets which were nice, and the next night I grilled the "burger", best burger I ever had. It was probably 40% fat.