Grandma Edith's Brisket Sauce

5-6 pounds of trimmed brisket of beef, seasoned with salt and pepper.
2 onions chopped & 4 T. butter.
Add 1 ½ c. water, 2 c. catsup, ½ c. lemon juice, 4 T. brown sugar, 4 T. vinegar, 6 T. Worcestershire sauce, 3 t. dry mustard, 2 t. liquid smoke, 2 t. salt, and dash cayenne.

Place in a pan and cover with foil. Bake 275 for 5 hours.

Saute onion in butter until golden brown and add remaining ingredients.

Simmer for 30 min. Remove meat and pour off fat.

Pour ½ of sauce over meat and bake uncovered for 30 min.

Slice meat thinly and heat through 15 more min.

Serves 10. Serve remaining sauce with meat.