Heat oven to 400 degrees. In pan melt butter and add flour in slowly until thick. Add cream or milk and mix well. Add in cooked chicken, broth, garlic, onion, carrots, and peas. Stir until heated through completely and sauce is thickened. Take store bought biscuits and roll out into a pie pan size top. Spray pie pan dish and add chicken filling. Cover pan with biscuit top. Pinch edges, cut three small slices in the top for venting and lightly brush with egg whites. Place in oven and cook 10-12 minutes. Biscuit topping should be cooked through and browned.