Stuffed Steak with Balsamic Mushroom Sauce

Well, this is one of those recipes I found and then just totally tweaked to what I had in my own fridge.  This is my own version ..great on the BBQ or you could bake it in the oven.  I served it with a baked potato and salad.  Perfect warm weather meal!

2 cube steaks
1/4 c. sliced onion
1/4 c. carrot cut in very thin strips
1/4 c. sliced red pepper

for the marinade:
3 T. Worchestershire sauce
1 T. olive oil
1 T. monterey steak seasoning

for the steak sauce
 1/2 c, sliced mushrooms
2 T. butter
2 t. chopped shallots or onions
1/4 c. beef broth
1/4 c. balsamic vinegar
2 T. brown sugar

Lay the cube steaks flat, pour marinade over and marinate at least 20 minutes.   Take steak out of marinade and arrange 1/2 of each of the vegetable on one end of the steak.  Roll up and secure with toothpicks.  BBQ for 10 minutes or bake at 350 for 20 minutes.
Meanwhile combine all the ingredients for the sauce in a sauce pan and simmer for 10-15 minutes.  Serve sauce over steak.