1/2 cup plus 2 Tbsp. steak sauce (your choice)
2 Tbsp. sugar
2 tsp. orange zest
1/4 tsp. salt
1/8 tsp. crushed red pepper flakes or to taste
1 lb. boneless top sirloin steak (about 3/4 in. thick), all fat discarded
Preheat oven to broil
In a small bowl stir together steak sauce, sugar, orange zest, salt and red pepper flakes.
Lightly spray a broiler rack and pan with vegetable spray. Put steak on rack. Spoon 2 Tbsp. sauce over steak. Let stand for 15 minutes.
Broil about 4-in. from heat for 3 minutes. Turn the steak over and spread remaining sauce over steak. Broil 6 minutes or until desired oneness. Remove from broiler and let stand 5 minutes on a cutting board before thinly slicing.
This is really good with a good salad and garlic toast.