Grilled Gruyere and Sweet Onion Sandwiches.

1. 1

   In a deep skillet, melt 1 tablespoon of the butter with the olive oil.

2. 2

   Add the onion,cover and cook over high heat, stirring once of twice until softened, about 5 minutes.

3. 3

   Uncover and cook over medium-high heat, stirring occasionally, until the onion is tender and caramelized, about 25 minutes.

4. 4

   Add water to the skillet as necessary to prevent onion from scorching.

5. 5

   Season with salt and pepper.

6. 6

   Spread bread with remain butter and arrange, buttered side down, on work surface.

7. 7

   Spread a thin layer of mustard on each slice.

8. 8

   Top half of the slices with onion, Gruyere and pickles.

9. 9

   Preheat skillet or panini press.

10. 10

    Grill sandwiches over low heat until bread is toasted and cheese is melted.

11. 11

    Cut in half and serve.

* Per serving · 4 servings · Values may vary.

No additional tips available.