Clean, peel, and slice the zucchini into half-inch (1.3 cm) slices. Take out the seeds, coat with flour, and fry in butter until lightly browned on both sides.
Grate the carrots and potatoes on the rough grating slots, and dice the onion, mix with the ground meat, and fry in cooking oil until browned. Lightly beat the egg and mix with the fried meat and vegetables