The clean duck is placed in a pyrex with a lid and pour beer. Add sliced ​​lemon, salt and peppercorns 15-20. Stews in the oven at 250 ° C for about 1 hour. Then removed and pooled 2/3 of juice for sauce. Sprinkle with curry half and returned to the oven, as the court is left without cover and bake until browned, giving all sides. In a frying pan bake lightly flour and add compartments juice, stirring constantly. Allow to boil, continuing to stir. Add the remaining half of curry and leave a little to boil until it thickens. Duck is served cut into portions, garnished with mashed and comes sauce.