Mix together soy sauce, honey, mustard & garlic. Place spareribs in roasting pan. Bake at 300 for 45 minutes. Pour off grease. Bake 1 & 1/4 hours until tender, basting constantly to keep the ribs covered with sauce. When done remove ribs. Add 1/4 cup water to sauce. Cook on top of stove, stirring until blended. Make a paste with flour, & add to sauce. Cook until thick. Replace ribs in gravy. Return to warm oven. Keep hot until serving time.