French Onion Meatballs Recipe - Comfort Food at Its Best

Ingredients

• 1 ½ cups breadcrumbs (or panko).
• ¼ cup + 2 tbsp whole milk.
• 1 ½ lbs ground beef (85/15 lean).
• 1 tbsp chopped parsley.
• 1 tsp fresh thyme leaves (plus extra for garnish).
• 1 tsp herbes de Provence.
• 1 tsp salt.
• ¼ tsp black pepper.
• ½ large white onion, minced.
• 4 cloves garlic, minced.
• ¾ cup grated Gruyere cheese (divided).
• 1 egg, whisked.
• 1 cup shredded mozzarella cheese.
• 4 tbsp olive oil (divided).
• 2 tbsp butter.
• 2 ½ large white onions, sliced.
• 1 tsp herbes de Provence (for sauce).
• 1 tsp dried thyme.
• ¼ cup sherry (or white wine).
• 1 ½ tbsp flour.
• 2 ¼ cups beef stock.
• Salt and pepper to taste.
• 2 tsp fresh thyme leaves (for garnish).