Grilled Burger au Poivre - Sutter Home Family Vineyards

Ingredients

• 2/3 cup mayonnaise
• 1 California avocado, pureed
• 1 tablespoon Olive oil
• 1/4 cup minced shallots
• 2 teaspoons minced fresh garlic
• 30 ounces ground Buffalo
• 1/4-cup Pinot Noir
• 1/8 cup lightly packed fresh thyme
• 1 tablespoon Dijon Mustard
• 1 tablespoon green peppercorns, chopped
• Vegetable oil, for brushing on the grill rack and peppers
• 3 assorted peppers, roasted and sliced
• 1 tablespoon butter melted
• 6 Kaiser rolls
• 6 red leaf lettuce leaves