Greek Turkey Burgers

For 4 burgers:

1 1/3 lb ground turkey breast

1 (4-oz.) package crumbled feta cheese

1/4 C. finely chopped red onion

1 tsp. dried oregano

1 tsp. lemon zest

1/2 tsp. salt

Cucumber Sauce:

1/2 C. grated English cucumber

1 (6-oz.) container fat-free Greek yogurt

1 Tbsp. chopped fresh mint

1/2 tsp. salt

vegetable cooking spray
4 French hamburger buns, split and toasted

Toppings: lettuce leaves, tomato slices, thinly sliced cucumber

Garnish: pepperoncini salad peppers

Stir together first 6 ingredients. Shape mixture into 4 (1/2-inch-thick) patties.
Heat a grill pan over medium-high heat. Coat grill pan with cooking spray. Add patties; cook 5 minutes on each side or until done.
Stir together cucumber, yogurt, mint, and 1/2 tsp. salt in a small bowl. Serve burgers on buns with cucumber sauce and desired toppings. Garnish, if desired