Smoked Gouda and Caramelized Onions Turkey Burgers

2 cups thinly sliced onions
1/2 tsp sugar
1 tbsp butter
1 slightly beaten egg
3 TBSP fine bread crumbs
1 TBSP fresh parsley
1 tbsp Worcestershire
1/4 tsp garlic salt
1/4 tsp black pepper
1# uncooked ground turkey
4 oz shredded smoked gouda
4 kaisar rolls, split

In a large skillet, cook onions and sugar, covered in hot butter over medium low heat for 13-15 minutes. Uncover. Cook and stir over medium high heat for 2-5 minutes until onions are golden.

In a medium bowl, combine egg, bread crumbs, parsley, Worcestershire, garlic salt, and pepper. Add ground turkey and mix well. Shape turkey mixture into 4 3/4 inch patties.

Preheat indoor electric griddle. Place patties on grill rack. Grill until no longer pink. Top burgers with onions and cheese. Serve on buns.