Directions:

1. Cook the Sirloin steak according to package directions.
2. While steak is cooking prepare the rest of the ingredients.
3. Mix basil mayo ingredients together.
4. Slice and saute the onions for 8-10 mins. until they start to brown nicely.
5. Slice and saute the mushrooms in a small amount of oil for 2-3 mins.
6. Let the steaks rest for several mins. the slice the steaks into thin strips.
7. Slice buns open. Optional – brush buns lightly with olive oil and toast them on the grill or on a flat skillet.
8. On the top portion of the bun layer the following ingredients – basil mayonnaise, tomato slice and onions.
9. Place the lettuce on the bottom portion of the bun and top with the steak slices, mushrooms and shredded cheese.