First mix the meat ingredients and marinade meat for 1 1/2 hrs at room temperature
In a LG frying pan, add 1 tbs oil. Saute onion, mushrooms, and asparagus until mushrooms are close to done. Asparagus should still be crisp. Add balsamic vinegar, 1/4 cup water, and frozen veggies. Steam until liquid cooks out.
Place veggies in a lightly greased 9 X 13 baking dish.
Meanwhile peel and boil potatoes. When soft, drain. Add butter and seasonings. Mash. Add milk until potatoes become smooth.
In same pan as the veggies, add 1 tbs oil. Sear London broil over med high heat until browned on both sides but still rare. Remove to a cutting board. Slice thinly across the grain. Layer over the veggies.
Pour the gravy over everything. Spread the potatoes evenly on top. Bake at 425 for 15 minutes. When done add cheese and return to the oven until cheese melts.
Serve immediately. I served with cottage cheese.
