Steak with Mushrooms and Onions II

Gluten Free Steak with Mushrooms and Onions II (not sure about the points... I'd say around 6-7)

So this is a slight variation on the steak with mushrooms and onions recipe I already posted.  I took a few recipes and added in some of my own ideas and came up with a yummy marinade that would probably be even yummier in the crock pot if the meat had time to get really tender.

**I made it in the crockpot and it was DE-lish!  Throw all of the ingredients into the crockpot and let it cook for 8 hours.  After about 6-7 hours, throw in the onion and mushrooms.
Ingredients:
1 1/2 lb thin cut beef round sandwich steaks
1/2 large onion, sliced into rings
1/2 tsp olive oil
8 oz sliced mushrooms (I generally use canned because I am lazy)
4 seconds cooking spray
garlic powder to taste
salt and fresh cracked pepper to taste
3/4 can of Progresso GF French Onion Soup
1/2 can of water
1/2 tsp ground mustard powder
1/2 tsp red pepper flakes
1 1/2 tsp Heinz Worschestire sauce *you need to be very careful becasue some people with Celiacs react badly to Worchestore suace, I don't*
1/2 cup Gold's Red Horseradish
1/2 cup Boar's Head Deli Mustard
4 slices of provolone cheese or swiss cheese (they sometimes dust cheese with flour to prevent sticking once it is packaged, so just be sure your brand is GF)


Directions:
Slice beef into thin strips. Season with salt, garlic powder and fresh pepper to taste. Heat a large skillet over high heat. When the skillet is very hot, spray with cooking spray and add the beef. Cook until cooked through, turn and repeat for the other side.  While meat is cooking, add in mushrooms and onions and cook until tender. Add in Lipton French Onion soup, water, mustard powder, red pepper flakes, and Worschestire sauce, and simmer.   Melt cheese on top of meat and vegetables. 
Mix together horseradish and mustard, and use as a dipping sauce (or if you use bread, spread on bread).

Serve over rice, on bread as a sandwich, or with oven baked fries for extra points.