Sweet & Spicy Sliders

Preheat grill to medium-high.

To prepare ketchup: Whisk ketchup, Sriracha, shallot and vinegar in a small bowl.

To prepare sliders: Combine beef, Worcestershire, salt and pepper in a medium bowl. Form into 6 patties, about 3 inches in diameter.

Oil the grill rack (see Tip). Grill the burgers until an instant-read thermometer inserted in the center registers 160 degrees F, 3 to 5 minutes per side. Grill pineapple and scallions until lightly browned and tender, 1 to 3 minutes per side. Cut the scallions into 2-inch lengths.

Heat oil in a small skillet over medium heat. Add mushrooms and cook, stirring frequently, until tender and all the liquid evaporates, 3 to 4 minutes.

Assemble each burger on a bun with a scant 1 tablespoon of the Sriracha Ketchup, pineapple, scallion, mushrooms and arugula.