• 2-1/2 lbs. Harris Ranch ground beef
• 1/2 cup dry bread crumbs
• 2 tbsp. extra-virgin olive oil
• 2 large eggs beaten
• 1/2 medium onion diced
• 2 cloves garlic minced
• 1/2 tsp. dried oregano
• 2-1/2 tsp. kosher salt
• 1/2 tsp. freshly ground black pepper
• 1/2 cup ketchup

Filling

• 1 lb. mushrooms sautéed, (1 cup when cooked)
• 1 lb. onions sautéed, (1 cup when cooked)
• 6 slices of bacon