How To make Mushroom Beef Patties

1 pound ground beef
1/4 cup dry bread crumbs
2 Tablespoons milk
1 Tablespoon Worcestershire sauce
1 teaspoon salt

divided
1/2 teaspoon pepper
1/2 teaspoon garlic powder
1/2 pound fresh mushrooms :

sliced
1 teaspoon dried basil
5 Tablespoons butter or margarine -- divided
2 Tablespoons all-purpose flour
1/2 cup half and half
1/2 cup water
1/4 teaspoon hot pepper sauce
1/4 cup shredded cheddar cheese
2 Tablespoons green onion -- chopped
Combine beef, crumbs, milk, Worcestershire sauce, 1/2 teaspoon salt, pepper and garlic powder; mix well. Shape into 3 or 4 oval patties; cook on both sides until no longer pink. Cook the mushrooms and basil in 2 Tablespoon butter over medium-high heat until tender. Increase heat to high; cook and stir until most of the liquid evaporates. Melt the remaining butter; stir in flour. Gradually blend in cream. Add 1/2 cup water, hot pepper sauce and remaining salt; cook and stir on low until thickened and bubbly. Cook and stir for 2 minutes more. Add enough remaining water to make a medium-thin sauce. Add mushrooms; heat through. Serve over beef patties; top with cheese and onions.