French Onion Chicken Meatballs

Ingredients

• 2 tbsp extra-virgin olive oil (for greasing baking sheet)
• 1 lb ground chicken
• 1/2 cup shredded Gruyère
• 1/4 cup bread crumbs
• 2 tbsp freshly chopped parsley
• 1 large egg, beaten
• 2 cloves garlic, minced
• 1 tsp kosher salt
• Freshly ground black pepper
• 4 tbsp butter
• 1 container Reese Original Caramelized Onions
• 2 cups low-sodium beef broth
• 2 tsp freshly chopped thyme, extra for garnish
• Kosher salt
• 1 1/2 cup shredded Gruyère