1 3-pound trimmed flank steak
2 tbsp dark brown sugar
1 tbsp beef base concentrate
1 tsp chopped garlic
½ cup vegetable oil
1 tbsp coarse ground black pepper
3 tbsp light soy sauce
1 tsp onion powder
½ cup warm water
Mix warm water with beef base and brown sugar to dissolve. Add all other ingredients together and mix well. Place flank steak in glass baking dish and cover top and bottom with marinade. Cover with plastic wrap and place in refrigerator for 6 hours.
Grill until done and slice against the grain. Serve on hot French bread with sautéed mushrooms and onions. Top with shredded Swiss cheese and place under broiler until melted.
***OH MY GOSH I can't believe I finally found something that the whole family liked!! At first when making this I heard... yuck ... oh man it's got onions ... but after they tried it they couldn't wait to finish so they could get more before it was gone. OH YES, I will be making this again!