Sliced up the roast beef I cooked in the oven yesterday and there’s a weird shiny rainbow shimmer on the cut surface. It looks metallic or like oil. Is this spoiled or safe to eat?

Have you ever sliced into a piece of roast beef only to be greeted by an unexpected rainbow shimmer on its surface? This phenomenon can be quite alarming, especially if you’re concerned about the safety of your meal. The iridescent sheen might remind you of oil slicks or metallic surfaces, leaving you to wonder if your beef has spoiled or …