A beaten egg is an egg that has been whipped or beaten until it becomes foamy and light in texture. This process can involve cracking the egg into a bowl, adding a pinch of salt, and then using a fork or whisk to beat the egg until the whites and yolk are fully combined and the mixture is fluffy.
Beating an egg can be done for various reasons such as when making meringues, soufflés, omelets, scrambled eggs, or simply to add volume to a recipe. The process of beating an egg can also help to incorporate other ingredients into the mixture more easily and evenly distribute flavors throughout the dish.
Overall, a "beaten egg" refers to an egg that has been whipped until it reaches a light and fluffy consistency, which can greatly enhance the texture and appearance of many different recipes.