You can prepare the dip and place it in the oiled casserole dish the night before you need to serve it. Cover the casserole dish with a lid or wrap it tightly in plastic wrap or aluminum foil, and store it in the refrigerator. When ready to bake, remove the covering off the dish and bake it at 350 degrees Fahrenheit for about 15 minutes until warmed. Be careful not to bake it for too long so the oils do not separate.