I do not buy breast separately without chicken for serving on the festive table. I always buy a whole big chicken and cut it off with the bone. I'll bake it on a bone, too. In my opinion, the breast is juicier. Cut off the breast along with the capture of the bone, do not remove the skin. Washed, dried, rubbed with a small amount of salt on all sides. Put it in a bowl, add the onion, cut into half rings (there are a lot of onions) and garlic, cut into plates. I fill the bean liquid with homemade mayonnaise without eggs, mustard and Georgian sauce. Below I will give you a link to homemade mayonnaise, and you will see its recipe. I have been using this mayonnaise for a long time, and the recipe was taken by me on this site. If you don't have a ready-made Georgian sauce, you can cook it yourself. The basis of the sauce is tomato paste. It is diluted with boiled water, finely chopped coriander, spices, salt, adjika are added to it, you can add onions, if desired, vinegar. Evenly put the whole breast covered with onions under it. Cover with a lid and put in the refrigerator overnight. You can marinate the breast for 2 hours, but preferably overnight.