Shape about 3 tablespoons of ground beef into a 1" thick pattie, sprinkle with salt and pepper. Repeat with remaining mixture. Cover and refrigerate until ready to cook.
Melt butter in a skillet and add mushrooms, scallions and shallot. Cook 3 minutes, stirring occasionally; add Carlo Rossi Merlot and simmer.
Grill burgers to preferred degree of temperature. Place each burger on miniature bun with lettuce and top with mushroom mixture.
Makes 16 servings