blue-rugula burgers

Ingredients

1 tbsp. olive oil
1 tbsp. butter
2 onions, thinly sliced
1 tbsp. brown sugar
salt and pepper
1 lb. ground sirloin
3 cloves garlic, minced
3 tbsp. Worcestershire sauce
handful of breadcrumbs
1/2 lb. blue cheese, thinly sliced
crusty rolls, lightly toasted
2 handfuls of arugula leaves
spicy brown mustard

Instructions

1. In a large nonstick skillet, heat the butter and olive oil over medium heat. Add onions, brown sugar and season with salt and pepper. Lower the heat to medium-low and cook until caramelized and sweet, about 40 minutes.
2. Combine meat with garlic, Worcestershire, breadcrumbs, salt and pepper. Form 2-3 patties.
3. Grill burgers. In the last minute of cooking time, top burgers with a few slices of blue cheese.
4. Place burgers on bun bottoms and top with arugula and caramelized onions. Spread spicy brown mustard on the top bun.

*Adapted from Rachel Ray