In skillet cook ground beef or pork and onion till meat is browned; drain off fat. Stir in 1/2 cup of the soft bread crumbs, the 3/4 teaspoon salt, the thyme, and pepper.

In saucepan melt the 3 tablespoons margarine or butter; blend in flour and the 1/2 teaspoon salt. Add milk all at once. Cook and stir till thickened and bubbly. Add cheese, stirring till melted. Stir in meat mixture and cooked vegetables.

Turn meat-vegetable mixture into six 1 cup individual casseroles. (If desired, cover andd refrigerate casseroles up to 24 hours.) Combine remaining bread crumbs with the 2 tablespoons melted margarine or butter. Sprinkle atop casseroles just before baking. Bake in 350 oven about 20 minutes or till heated through. (Bake about 35 minutes if chilled.) Makes 6 servings.