Bushmills Flamed Steak

1 (1 1/2 pound) boneless sirloin strip
    steak, 3/4-inch thick
4 tablespoons butter
2 cups sliced fresh mushrooms
1/2 cup thinly sliced onions
1/4 cup Old Bushmills Irish Whiskey
3/4 cup cream
2 teaspoons flour
1/4 teaspoon tarragon
1/8 teaspoon granulated sugar
Salt and pepper
Parsley, to garnish

Heat skillet very hot. Melt butter until golden and add steak. Sear on both sides and cook to your taste. Remove steak to heated platter.

Quickly saut