1 cup cooked peas
1 cup cooked carrots
1 cup cooked string beans
2 cups mashed potatoes
3 tablespoons butter
1 onion, minced
3 tablespoons flour
2 cups milk or vegetable broth
2 teaspoons salt
1/2 teaspoon pepper
1/2 teaspoon celery salt
1/2 cup grated cheese
1/2 cup bread crumbs

Arrange chopped cooked vegetables in layers or mix together in a greased baking dish.

Melt fat in a saucepan; add onions and flour. When slightly brown, gradually add the milk. Add seasonings. When sauce is smooth and thickened, add the grated cheese. Stir until cheese is melted, then remove from heat. Cool slightly and then pour sauce over vegetables. Sprinkle with crumbs. Bake at 350 degrees F for 45 minutes.