Add chops and brown each side, approximately 5 to 10 minutes. Remove chops from pan to a warm, paper towel-covered platter. Add sliced onion and brown. The trick is to get the flour as brown as possible without burning it or the onion. Add water and stir.
Return chops to pan and add sufficient water to cover.
Season to taste with additional seasoning mix, if desired. Add chicken or tuna, noodles, celery, water chestnuts. Put in buttered casserole dish. Sprinkle cornbread crumbs on top. Sprinkle melted butter over crumbs.