Cut the lemon and the potatoes into slices and fry them with some extra virgin olive oil.
Remove the potatoes from the pan, and put them on a kitchen paper to remove excess oil.
Place the potatoes and the lemon on the base of an oven mold. Cut the fish into pieces, and smear with Ametlla+ on both sides and add a drizzle olive oil. Put everything in the heated oven at 180 º C for 10 minutes.