Cedar Planked Burgers - BC Coastal Grilling Planks

Ingredients

• 4 portobello mushrooms, stems removed
• 4 shiitake mushrooms, stems removed
• 2 Walla Walla onions, peeled and cut into 1/4- inch slices
• Canola oil
• Salt and freshly ground black pepper
• 2 untreated cedar planks, each about 5 by 12 inches, soaked in water to cover for at least 2 hours
• 1 1/2 pounds ground chuck (80-percent lean)
• 1 cup Red Wine Barbeque Sauce, recipe follows
• 8 slices good-quality aged white Cheddar
• 4 hamburger buns, split and lightly toasted on the grill
• 1 1/4 cups ketchup
• 2 tablespoons ancho chili powder
• 2 tablespoons honey
• 2 tablespoons molasses
• 2 tablespoons dark brown sugar
• 1 heaping tablespoon Dijon mustard
• 1 tablespoon paprika
• 1 tablespoon red wine vinegar
• 1 tablespoon Worcestershire sauce
• 1/4 teaspoon chili de arbol or cayenne
• 1 canned chipotle chili in adobo, chopped
• 2 cups dry red wine, such as pinot noir