Cooking depicts a frying egg in a pan (sunny-side up) and is used both literally for breakfast/cooking content and as a general 'making food' or 'in the kitchen' indicator; it was part of the original 2010 Unicode set and has kept a fairly consistent sunny-side-up design across vendors.
Keywords: breakfast, cooking, easy, egg, fry, frying, over, pan, restaurant, side, sunny, up