A croquette is a small breadcrumbed fried food roll containing, usually as main ingredients, mashed potatoes or ground meat (veal, beef, chicken, or turkey), shellfish, fish, cheese, vegetables, and mixed with béchamel or brown sauce, and soaked white bread, egg, onion, spices and herbs, wine, milk, beer, or any of the combination thereof, sometimes with a filling, e.g. sautéed onions, mushrooms, or boiled eggs (Scotch eggs). The croquette is usually shaped into a cylinder, disk, or oval shape, and then deep-fried. The croquette (from the French croquer, “to crunch”) gained worldwide popularity, both as a delicacy and as a fast food. (source)