Cut the chicken breast into 2 cm thick slices. Put them in a bowl. Season them with salt pepper. Add the 2 garlic cloves, minced, and the grated cheese. Coat the chicken pieces well.
Wrap each mini fillet with slices of bacon and place them on a plate.
Slice the onion into rings and lay these in a roasting dish. Add the chopped garlic and a few pinches of the rosemary. Drizzle with a little olive oil.
Sit the wrapped chicken breasts on top of the onion and sprinkle with the rest of the rosemary. (You can rest this in the fridge until you’re ready to cook).
Cook in the oven for 20-25 minutes, until bacon is crispy and the chicken is cooked through.