Here’s a flavorful combo to try!
1 large onion, thinly sliced (about ⅛-inch thick)
1 tablespoon olive oil
¼ teaspoon salt
Pinch of dried thyme
Pinch ground black pepper
4 tablespoons beef stock (use vegetable stock to keep it vegetarian)
4 slices of bread (hearty bread preferably whole grain)
1 tablespoon butter
¾ cup grated Gruyère cheese (or Emmental cheese or Swiss cheese)
Chopped fresh parsley
Do It And How 