Cheesy French Onion Bake Side - Chef Melt

Ingredients

• 2 big yellow onions, sliced thin
• 2 tbsp unsalted butter
• 1 tsp sugar, if you'd like
• 1 tbsp olive oil
• 1/2 tsp ground black pepper
• 1 tsp salt
• 1/2 tsp garlic seasoning
• 1/2 tsp dried thyme or double the amount of fresh thyme
• 1/2 cup of beef stock or veggie stock
• 4 big Yukon Gold potatoes, cut into 1/4-inch slices
• 1 tbsp of butter to grease your dish
• 1/2 teaspoon of salt
• 1 cup of shredded Gruyère, Swiss, cheddar, or mozzarella
• 1/2 cup grated Parmesan cheese
• 1 cup of heavy cream or whole milk
• 1/4 tsp black pepper
• 1 tsp fresh thyme leaves
• Extra thyme sprigs for garnish
• More grated Parmesan
• Crunchy fried onions, optional