Once the chicken is finished, do not clean out the fry pan. Add the 5 Tablespoons of butter. Once melted add in the minced onion. Sauté for a few minutes, till tender.
Pour all of the leftover dredge mixture into the butter and onions. Stir till the butter is absorbed and it looks like a crumbly paste.
Over medium heat, add the chicken broth. Stir till it looks like a thick paste.
Add in the milk, lemon juice and pimientos. Stir till thick and smooth. If it is too thick add a little more chicken broth while stirring and it has reached your desired thickness.
Pour the sauce over the chicken in the baking dish. Bake at 325° for 1 hour.
I often place scrubbed, lightly greased and poked potatoes on the rack under the chicken, so they bake at the same time as the chicken does.
Serve on rice or with baked potatoes.