Ingredients:

3 tablespoons mayonnaise
3 tablespoons salsa
1/2 teaspoon Worcestershire sauce
1/8 teaspoon pepper
2 teaspoons olive oil
1 medium onion, finely diced
1 zucchini, finely diced
1-1/4 pounds ground beef chuck or ground turkey
2 teaspoons Worcestershire sauce
1 teaspoon salt
1/2 teaspoon pepper
4 (7-inch) warm pita breads

Preparation:

Combine mayonnaise, salsa, Worcestershire sauce, and 1/8 teaspoon pepper in a small bowl.

Heat oil in nonstick skillet; add onion and half the zucchini and cook 3 to 4 minutes, until tender. Cool.

Toss beef with zucchini mixture, Worcestershire, salt, and 1/2 teaspoon pepper. Shape into four 1/2-inch-thick patties.

Heat grill pan. Grill patties 5 to 6 minutes per side until an instant-read thermometer inserted into side of burger registers 160°F (165°F for turkey). Place burgers, sauce, and remaining zucchini inside pita's.