Soy Burger and Escalloped Potatoes

1 pound soy burger
1 teaspoon salt
5 medium potatoes -- sliced thin
1 large onion -- sliced thin
Salt and pepper
1 small can cream of mushroom soup
1 cup milk
1/4 cup chopped green pepper -- optional
1 10 oz frozen mixed vegetables
Butter
Brown the soy burger with salt until slightly brown, stirring frequently and breaking up into small pieces. (Sprinkle salt in pan, add meat, and use no shortening). Alternate in a buttered casserole, layers of browned meat, sliced potatoes, sliced onions and frozen vegetables; pour half of diluted warm mushroom soup on top. Repeat. Sprinkle pepper and paprika on top. Dot with butter and bake at 350 F. for 1 to 1-1/2 hours, or until potatoes are done.