Cut broiler fryer into serving size pieces.
Combine flour, 1 teaspoon of the salt and tarragon in a plastic bag.
Shake chicken in flour to coat; tap off excess.
Melt butter or margarine in a 13x9x2 inch baking pan.
Coat chicken on all sides in melted butter or margarine, then turn the pieces skin side up.
Bake in moderate oven (375°), brushing often with pan drippings, 30 minutes.
Meanwhile, make Lemon Baste: Mix lemon juice, instant minced onion, garlic, remaining 1/4 teaspoon salt and pepper in a small bowl.
Brush chicken pieces with part of the Lemon Baste.
Bake, brushing occasionally with remaining Lemon Baste, 30 minutes longer, or until chicken is tender.