place each piece of steak between 2 pieces of plastic wrap and hammer it to 1/8" thick with the smooth side of a mallet, then cut into 2" square pieces
Put the steak pieces in a large mixing bowl, season liberally with salt and pepper then toss with 2 tbsp flour
In a large pot heat some olive oil on medium high and fry steak til no longer pink, remove from pot, leaving any juices.
Add onions and mushrooms to the pot, season with salt and saute til onions begin to brown- 5 - 8 minutes
Add garlic, thyme, onion powder and peppers. Saute another 3-4 minutes, add 2 tbsp of flour, stir to combine, then slowly add beef stock, stirring to avoid lumps. Turn on your broiler.
Bring to a boil, reduce heat and simmer for 10 minutes. Return meat to pot and simmer another 5 minutes.
Ladel stew into bread bowls, then cover the top with cheese. Broil for 3 minutes or until cheese begins to brown.