Place 2 tablespoons olive oil in a large deep skillet, and turn on heat to medium. Meanwhile, sprinkle 1 pound of steak slices with meat tenderizer, to taste. Grind fresh black pepper over the top. Mix the seasonings thoroughly with the steak. Place steak in hot skillet, reduce the heat to low, and cook, stirring continually. After most of the pink is gone from the steak, add 4 or 5 cloves of minced garlic to the skillet of steak. Continue to cook and stir, until the steak is browned and has absorbed all the liquid it has produced during cooking. (It will be well-done, but tender.) Remove the steak to a tray covered with paper toweling to absorb any excess oil. Now, place 2 onions, cut into rings, into the skillet where the steak was cooked. Add 1 tablespoon of olive oil, and saute the onions until clear and beginning to brown. Remove from heat and hold in skillet until you are ready to add them to your sandwiches. Prepare an Italian sweet sub bun by cutting it into two equal parts lengthwise, spraying the cut sides with cooking oil, and browning it under the broiler in your oven. Place a browned bun on a sandwich board, and assemble your sandwich. I add about ? of the cooked steak, a generous portion of onion, some steak sauce (or mayonnaise) and then two thin slices of Cheddar cheese. Place the other bun-half on top, and the sandwich is complete! Serve with cheesy rice and a green tossed salad, and you have terrific lunch!!!