Red Wine Mushroom/White Wine Onion Burgers - Sutter Home Family Vineyards

Ingredients

• 2 tablespoons Colavita Extra Virgin Olive Oil
• 1½ cups diced onions
• 1 teaspoon kosher salt
• ½ cup Sutter Home Sauvignon Blanc
• ½ cup low or non-fat sour cream
• 1 bottle (750 ml) Sutter Home Zinfandel
• 1/3 cup dark brown sugar
• 1½ tablespoons Dijon mustard
• 1½ lbs. small crimini or white mushrooms, sliced about 1/8″
• ¼ cup finely chopped onions
• ¼ cup panko (Japanese breadcrumbs)
• 2 tablespoons Sutter Home Sauvignon Blanc
• 3 garlic cloves, minced or pressed
• 1½ teaspoons kosher salt
• 1/2 teaspoon freshly ground pepper
• 1½ pounds ground beef, 85/15
• 1 tablespoon vegetable oil, for brushing on the grill rack
• 6 good-quality hamburger buns, split
• 12 large fresh basil leaves, cut into chiffonade