Viennese Baked Flounder Rolls with Filling

Name: Viennese Baked Flounder Rolls with Filling
Ingredients: 6 fresh or 1 pound frozen flounder fillets; 1 onion, sauteed; 3 potatoes, cooked and mashed; 1 teaspoon salt; dash of pepper; 1 egg, beaten; 10 ounces Beleaves Frozen Broccoli, cooked and drained; 1/4 cup Gefen Mayonnaise; 1 teaspoon lemon juice; 1/2 teaspoon salt; 2 (7-ounce) cans salmon; 2 eggs, slightly beaten; 1/4 cup Yehuda Matzo Meal; 2 teaspoons Glicks Ketchup; 3-4 slices of bread, soaked and squeezed; 3 tablespoons oil; 2 onions, sauteed; 1 stalk celery, diced and sauteed; 1/2 pound mushrooms, sliced and sauteed; 1 egg; 2 ounces margarine (use soy-free if needed); 10 ounces fresh mushrooms, sliced; 1/4 cup Glicks Flour; 1 and 1/2 cup non-dairy creamer; 3 tablespoons lemon juice