Southwest Chipotle Buff Burgers - Sutter Home Family Vineyards

Ingredients

• 1 chipotle pepper in Adobo Sauce
• 2 tablespoons Adobo Sauce
• 6 sprigs flat leaf parsley
• 1/2 teaspoon kosher salt
• The juice of 1/2 of one lime
• 1 cup mayonnaise
• 1 1/2 pounds ground chuck
• 1/2 pound ground bison (buffalo)
• 1 tablespoon kosher salt
• 1 tablespoon coarse ground black pepper
• 1 tablespoon chipotle powder
• 6 pats salted butter
• Vegetable oil, for brushing the grill
• 6 slices chipotle cheese
• 12 1/2 in thick slices sourdough bread
• 6 romaine lettuce leaves
• 6 slices red onion (1/4-in-thick)
• 6 slices tomato (1/4-in-thick)