Rinse and peel the vegetables well. Sterilize jars and lids in a convenient way - over steam or in the oven.
Grate the carrots on a coarse grater or chop them by passing them through a food processor on the Korean carrot mode. Cut the onion into half rings, then chop randomly with a knife.
Place the grated carrots in a deep bowl, add sugar and salt.
Add onions to the carrots, stir the salad and wait until all the salt and sugar crystals dissolve.
Transfer the salad to a jar, pressing the vegetables tightly. Cover with a cotton napkin - a piece of cloth or a paper towel folded in half, secure with an elastic band and put in the refrigerator for a week.
The salad is ready to eat within a few hours after the start of marinating, but after a week its taste becomes richer. Before storing the jar for long-term storage, tightly close it with a metal lid.
Pickled carrots go well with potatoes and meat dishes. Thanks to its bright color, it looks attractive on the holiday table.