Roast Beef And Fontina Panini - cooking recipe

Ingredients

2 tablespoons butter
1 small onion, thinly sliced
2 tablespoons whole grain mustard
1/2 loaf ciabatta, split lengthwise
1/3 lb thinly sliced deli roast beef
4 slices bacon, cooked
3/4 cup shredded Fontina cheese

Preparation

Preheat panini grill.
In a medium skillet, melt butter over medium heat.
Add onion, and cook for 10-12 minutes or until very tender, stirring often.
Increase heat to med-high, and cook, stirring constantly, until onion is caramel colored; set aside.
Spread mustard over cut sides of bread.
Top bottom half of loaf with roast beef, bacon, caramelized onion, and shredded cheese; cover with top half of loaf.
Place sandwich on panini grill.
Close lid, and grill for 6-10 minutes or until bread is toasted and cheese is melted.
Cut in half and serve immediately.