Best-Ever Meat Loaf with Mushroom Gravy

Ingredients (26)

• cooking spray
• 1 lb ground beef
• 1 lb ground pork
• 1 cup yellow onion
• 1 cup Panko breadcrumbs
• ½ cup tomato sauce
• 2 large eggs
• 1 tbsp Worcestershire sauce
• 3 tbsp balsamic vinegar
• 1 tbsp thyme
• 1 tbsp flat-leaf parsley
• ¼ cup Parmesan cheese
• 1 tsp Kosher salt
• ½ tsp ground black pepper
• FOR THE MUSHROOM GRAVY:
• 3 tbsp unsalted butter
• ¼ cup shallot
• 2 cloves garlic
• 8 oz mushrooms
• 1 tsp Worcestershire sauce
• ¼ cup all-purpose flour
• 3 tbsp balsamic vinegar
• 2 cups beef stock
• ¼ tsp Kosher salt
• ¼ tsp ground black pepper
• 1 tbsp flat-leaf parsley