Potted Chicken

(from the kitchen of Edith Bunker, "All in the Family") 1⁄3 cup flour 1⁄2 teaspoon salt, for flour 1⁄8 teaspoon pepper, for flour 1⁄4 teaspoon thyme 3 tablespoons butter 1 onion, sliced 1 (16 ounce) can tomatoes, chopped 2 tablespoons chopped parsley 1 teaspoon sugar 1⁄2 teaspoon salt 1⁄4 teaspoon garlic powder 3 lbs chicken …