The "staff of life" easily can become the staff of the family grocery budget when it is purchased from bargain racks in supermarkets or at bakery thrift stores. These bargain bread products are usually quite fresh and since open dating appears on packages, consumers can look them over and purchase most of their bakery needs at great savings.

Grocery stores have limited supplies of day-old bread. Thrift bakery stores have the greatest supply and variety of merchandise. Bake-and-serve rolls, potato chips, cookies, cakes, pies and French bread are sold as well as staple bread items. Most of these products are excess merchandise which must be sold quickly. Some products at thrift stores are there because over-baking occurred. Others lack an ingredient which has left the product slightly below standard.

The Washington area has a number of thrift bakery stores where local residents can stock up and stretch their food budgets just a little further.

Arnold Bakery Thrift Store, White-hall shopping Center, Laurel-Bowie Road, Bowie, Md.

Entenmann's Bakery, 1327-A Rockville Pike, Rockville, Md.

Ottenberg Bakery Thrift Store, 5605 Sargent Road, Hyattsville, Md.

Pepperidge Farm, Cloverly Shopping Center, New Hampshire Avenue extended, Silver Spring, Md.

Schmidt's 8008 Crydenway, Forestville, Md., and 1305 Gude Drive, Rockville, Md.

Wonder Bread, 52nd Ave. & Addison Chapel Road, Beaver Heights, Md.; 11400 Baltimore Ave., Beltsville, Md.; 1175 Taft St., Rockville, Md.; 8522 Lee Highway, Merrifield, Va.; 5820 Seminary Road, Baileys Crossroads, Va.; 2301 Georgia Ave. NW; 641 S St. NW. BRUNCH BREAD (6 servings) 6 slices of bread 6 slices Swiss cheese 1 pound breakfast sausage, cooked and drained 5 eggs 1 cup milk 1 cup evaporated milk 1/2 teaspoon salt 1/2 teaspoon pepper 1 teaspoon Worchestershire sauce Dash paprika

Line a greased 13-by 9-inch pan with bread slices. Top each bread slice with a slice of cheese. Spoon the saugage onto the cheese. Beat together the remaining ingredients and pour over the ingredients in the pan. Bake for 50 minutes at 350 degrees.