Turkey Meatloaf Burgers with Cranberry Sauce and White Cheddar

Ingredients

• 4 tablespoons butter
• 1 small McIntosh apple, peeled and finely chopped
• 1 small or 1/2 medium onion, finely chopped
• 1 small rib celery, finely chopped
• Salt
• pepper
• 1/3 cup plain breadcrumbs (a rounded handful)
• 1 pound ground dark meat turkey (no white meat)
• 1 medium egg
• 1/4 cup flat leaf parsley, chopped
• 2 tablespoons Dijon mustard
• 2 teaspoons poultry seasoning (about 2/3 palmful)
• Extra virgin olive oil (EVOO), for drizzling
• Sliced sharp white cheddar, for topping
• 1/3 cup whole-berry cranberry sauce
• 3 tablespoons sour cream
• 2 tablespoons chopped chives
• 4 large sandwich-size sourdough English muffins, split and toasted
• 4 thin slices red onion
• 4 leaves red leaf or red romaine lettuce