In a small bowl combine the ketchup and the balsamic glaze for a delicious sauce.
In a large skillet, heat 2 Tbsp. olive oil and add the onions, sautéing them for about 5-8 minutes, or until clear and soft. Turn down to low, salt and pepper, and cook another 20 minutes. They will become brown and very sweet.
Add the ground turkey, wine, herbs, salt and pepper, garlic, and 2 oz. of cheese (chopped in very small pieces). Mix together and form 6 turkey burger patties.
Cook in a very hot skillet (with about 1 Tbsp. oil) for about 4 minutes on each side, until the patties are done.
Broil or toast the hamburger buns, ending with adding a slice of gouda on the larger top bun to melt, before putting the burger together.
Layer the bun, burger, sauce, onions, and top with the toasted bum with cheese. Serve.