French Onion Soup Grilled Cheese Sandwich

This delicious grilled cheese sandwich is inspired by the flavors of French onion soup, with caramelized onions, melted cheese, and crusty bread.

Ingredients - Serves 2

Heat the butter and olive oil in a skillet over medium heat.
Add the sliced onions and cook until caramelized, about 15-20 minutes. Season with salt, pepper, and thyme.
Remove the caramelized onions from the skillet and set aside.
Spread butter on one side of each bread slice.
Place two slices of bread, buttered side down, in the skillet.
Top each slice with a slice of Gruyere cheese and a slice of Swiss cheese.
Divide the caramelized onions evenly between the two sandwiches.
Top the onions with another slice of Gruyere cheese and another slice of Swiss cheese.
Place the remaining bread slices on top, buttered side up.
Cook the sandwiches over medium heat until the bread is golden brown and the cheese is melted, about 3-4 minutes per side.
Serve the French Onion Soup Grilled Cheese Sandwich hot and enjoy!