Ingredients

1 tablespoon unsalted butter 

1 tablespoon olive oil 

2 small onions, thinly sliced 

1/2 teaspoon coarse salt 

1/4 teaspoon freshly ground pepper 

3 strips cooked bacon, coarsely crumbled 

2 ounces fontina cheese, finely grated (about 2/3 cup)

Preparation

Melt butter with oil in a medium skillet over medium-high heat. Add onions, salt, and pepper. Cook, stirring often, until edges of onions turn golden, about 5 minutes. Reduce heat to medium-low. Cook until onion is softened and just golden brown, about 5 minutes.

Transfer onion mixture to a medium bowl. Let cool completely. Stir in bacon and cheese.