Lime and Black Peppercorn Burgers - Sutter Home Family Vineyards

Ingredients

• ½ cup sour cream
• 2 tablespoons finely chopped red onion
• 2 tablespoons chopped cilantro
• Zest of one medium lime
• 1 teaspoon coarsely ground black peppercorns (using a mortar and pestle or spice grinder)
• ½ teaspoon kosher salt
• 2 pounds ground round
• Zest of two medium limes
• ¼ cup chopped cilantro
• ½ cup finely chopped red onion
• 2 tablespoons coarsely ground black peppercorns (using a mortar and pestle or spice grinder)
• 2 teaspoons kosher salt
• 3 medium segmented limes (see segmenting instructions below)
• ¼ teaspoon salt
• ¼ teaspoon freshly ground black pepper
• 1 ½ teaspoons granulated sugar
• Vegetable oil for greasing grill rack
• 6 bakery style burger buns
• 6 romaine lettuce leaves
• 6 ¼ inch thick large tomato slices