Steak and Carmelized Onion Sandwiches

serves 4 ( 10 points +)

• 1 tsp. olive oil
• 3 onions, thinly sliced
• 2 tsp. sugar
• ¼ tsp. dried thyme
• 2 tsp. balsamic vinegar
• ¾ tsp. salt
• ¼ tsp. pepper
• 1 lb. flank steak
• 2 T. Dijon mustard or low fat mayo
• 8 slices Italian bread or rye bread
• 1 tomato, cut into 8 slices

Heat oil in a nonstick skillet. Add onions, sugar, and thyme. Cook, stirring occasionally until onions are golden, about 10 minutes. Add vinegar, ¼ tsp. salt and ⅛ tsp. pepper. Cook, stirring constantly until vinegar is evaporated. Remove from heat.
Meanwhile, spray broiler rack with cooking spray. Sprinkle steak with remaining salt and pepper.
Broil for 5 minutes per side or until desired doneness. Let stand for 5 minutes. Cut steak agains the grain.
Spread mustard or mayo on bread, then top with steak, onions and tomato.

adapted from " Weight Watcher's"