Ingredients

• 1 tablespoon vegetable oil
• 1 1/2 cup thinly sliced shiitake mushroom
• 1 1/2 cup thinly sliced white mushrooms
• 1/2 cup minced onion
• 1 celery finely chopped
• 2 cloves garlic minced
• 2 tablespoons balsamic vinegar
• 2 tablespoons wine vinegar
• 1 egg
• 1/2 cup dry breadcrumbs
• 1/3 cup chopped drained oil-packed sun-dried tomato
• 1/2 teaspoon dried thyme
• 1/4 teaspoon each salt
• 1/4 teaspoon each pepper
• 1 lb lean ground beef
• 1 lb lean ground pork

Topping:

• 3 tablespoons chili sauce
• 3 tablespoons ketchup
• 1 tablespoon Dijon mustard
• 1/4 teaspoon dried thyme