To make brine, combine the vodka, raspberry brandy, brandy, honey, orange juice, brown sugar, garlic powder, nutmeg, salt and Tabasco sauce. Blend thoroughly.
Inject the duck with brine using a brining needle; then allow to marinate for about 10 hours or overnight.
Place the duck on a rack in a roasting pan and surround with the onions.
Roast at 300° F about 2 hours 30 minutes. During last 30 minutes, pour 1 quart of water in the bottom of the pan. Remove duck from oven and allow it to rest.
Place pan drippings with onions in a stock pan; bring to a boil.
Make a slurry with water and flour, then whisk into the boiling pan drippings. Place the thickened drippings into a food processor and blend until smooth.
Break duck down into wing, breast, leg and thigh. Serve duck with pan gravy as desired.
Servings: 6