- 4
Ingredients
- 1 teaspoon olive oil
- 1/2 cup finely chopped onion
- 1 Tablespoon Worcestershire sauce
- 1 1/2 teaspoons Dijon mustard, divided
- 1/4 teaspoon kosher salt
- 1/4 teaspoon freshly ground black pepper, divided
- 1 pound ground sirloin
- cooking spray
- 1 ounce Danish blue cheese, crumbled (about 1/4 cup)
- 2 Tablespoons lowfat buttermilk
- 1 Tablespoon light mayonnaise
- pinch of sugar
- 4 whole-wheat burger buns, split
- 4 thick slices ripe tomato
- 4 thin slices red onion
Preparation
Step 1
Heat olive oil in a small skillet over medium. Add onion; saute 4 minutes or until tender. Transfer to a medium bowl, season with Worcestershire, 1 teaspoon mustard, salt and half the pepper. Add sirloin; mix gently to combine. Divide into four 4 1/2-inch patties.
Heat a grill pan over medium. Spray lightly with cooking spray and grill burgers 3 minutes per side or until just cooked through.
While burgers are cooking, mash blue cheese with the back of a fork in a small dish. Stir in buttermilk, mayonnaise, remaining 1/2 teaspoon mustard, sugar, and remaining pepper.
Arrange burgers on bun bottoms; top with sliced tomato and red onion. Slather bun tops with the blue cheese sauce, place atop burgers, and serve immediately.