For burgers:Heat a small non-stick sauté pan over medium heat.
Once melted, add the carrots and celery and sweat until almost tender.
Add scallions and thyme and mix just until combined.
Remove from heat and allow to cool.
In a large bowl, combine the ground turkey, sriracha sauce, egg, bread crumbs, salt, pepper and the cooled vegetables.
Form into 8 ounce patties about 1/2" in thickness.
Chill burger patties at least one hour.
Heat grill to medium heat and be sure it is clean and well oiled with vegetable oil.
Place turkey burgers on grill, turning once after 5 minutes and then flipping after an additional 5 minutes.
Cook for another 8-10 minutes after flipping until cooked through and internal temperature reaches 160 degrees.
Remove from grill.
Lightly drizzle the sliced red onions with vegetable oil and a pinch of salt and black pepper.
Grill red onions for approximately 2 minutes on each side.
Remove from heat.
To assemble:Place each cooked turkey burger on a toasted bun, and one tablespoon of whipped Greek yogurt goat cheese each and one slice of grilled red onion.
For whipped Greek yogurt goat cheese:Combine all ingredients and mix thoroughly.