Then get your tin foil sheets ready (double up if you don’t have the super strong thick tin foil. Place a handful of cooked baby potatoes on the tin foil and scatter some onions over the top. Then place the chicken breast on top of the potatoes and onions. Drizzle some marinade over the chicken breast then add on 2 to 3 slices of lemon. Then seal up the tin foil parcels – brings 2 edges together and fold over and then fold over the open edges to close up the parcel.