French Onion Grilled Cheese Sandwich
A delicious grilled cheese sandwich filled with caramelized onions and melted Gruyère cheese.
- Time: 45 min
- Servings: 2
Source: Themomdish
Ingredients
- large onions, thinly sliced
- tablespoons olive oil
- tablespoon butter
- teaspoon sugar
- Prise salt to taste
- Prise pepper to taste
- slices crusty bread
- slices Gruyère cheese
- tablespoon fresh thyme leaves
- beef or vegetable broth
- tablespoon balsamic vinegar