Pour drippings (fat and juices) into a bowl leaving brown particles in pan. Let fat rise to top of drippings. Skim off fat reserving ¼ cup.
Place reserved fat in pan. Blend in ¼ cup all purpose flour. Cook over low heat stirring until mixture is smooth and bubbly. Remove from heat.
Measure meat juice. Add water to measure 2 cups liquid and stir into flour mixture. heat to boiling stirring constantly. Boil and stir one minute.
Stir in 2 cloves garlic, crushed, 1 ½ teaspoon salt ½ teaspoon pepper ¼ teaspoon ginger ¼ cup ketchup and 2 tablespoons vinegar.
Reduce heat simmer 10 minutes during occasionally.