French Onion Grilled Cheese Sandwich Easy and Tasty Meal

Ingredients

• 2 large yellow onions, thinly sliced
• 2 tablespoons unsalted butter
• 1 tablespoon olive oil
• 1 teaspoon sugar
• Salt and pepper to taste
• 4 slices sourdough bread
• 4 slices Gruyère cheese
• 1 slice aged cheddar cheese
• 1 tablespoon Dijon mustard
• Fresh thyme leaves for garnish

Instructions

1. In a large skillet, melt the butter and olive oil over medium heat. Add the sliced onions and a pinch of salt.
2. Cook the onions slowly, stirring occasionally, until they become soft and caramelized, about 20-25 minutes. Add the sugar halfway through to help with caramelization.
3. Once the onions are golden brown and caramelized, season with salt and pepper to taste. Remove the skillet from heat and set aside.
4. Heat a separate non-stick skillet over medium heat. Spread Dijon mustard on one side of each slice of sourdough bread.
5. Place 2 slices of bread, mustard-side up, in the skillet. Layer with 2 slices of Gruyère cheese, half of the caramelized onions, and a slice of aged cheddar cheese. Top with the remaining Gruyère and then the other slices of bread, mustard-side down.
6. Grill the sandwiches for about 3-4 minutes on each side, pressing down lightly, until the bread is golden brown and the cheese is melted.
7. Repeat the grilling process with the second sandwich.
8. Once done, let the sandwiches rest for a minute, then slice diagonally and garnish with fresh thyme leaves.