Chicken medallions in the oven

Peel the onion from the husk and cut it into small cubes. Champignons are also in small pieces. Fry them in a frying pan until light golden brown. Of course, medallions made with porcini mushrooms and blueberries are tastier, but this can only be done in season.
I wash the chicken fillet, remove the excess liquid with napkins or paper towels, and finely chop the chicken meat. The resulting mass should resemble minced meat in its consistency.
In the resulting minced meat, add ketchup, spices for chicken, if necessary, season with salt. Mix all the ingredients well.
Add a small amount of mayonnaise to the cooled mushrooms and onions. Mix the ingredients well.
Spread foil sheets on a baking sheet, lubricate them with vegetable oil. From the prepared minced meat, we form round-shaped medallions and put them on a baking sheet.
Three pieces of cheese on a fine grater. Then we spread a teaspoon of mushroom filling with onions on each chicken medallion. Sprinkle the mushrooms with grated cheese on top. We send a baking tray with prepared medallions to an oven preheated to 180 ° C and cook them at this temperature for 25 minutes.

Today, many housewives use chicken meat in their kitchen on a regular basis. So that chicken meat does not turn out to be dry, as it often happens, you have to experiment. Today I conducted another experiment, and it was a success. In this recipe, ketchup and mayonnaise were used to give the medallions juiciness. In fact, they can be replaced, for example, sour cream or natural yogurt can be used instead of mayonnaise, ketchup can also be replaced. Also, they will not turn out dry, since the medallions are complemented by a filling of mushrooms, onions and, of course, cheese. For those who like greens, you can add a little chopped dill to the minced chicken.