My usual “beef” with turkey burgers (haha) is that they often end up kind of dry and bland. Not these. They are juicy and so flavorful. The secret? A good amount of harissa and lots of aromatics mixed into the burger patties, then topping them with a quick yogurt sauce made with lemon, mint and more harissa.
Prepare the burgers: Line a baking sheet with aluminum foil or coat with cooking spray.
Combine the turkey, harissa, onion, garlic, herbs, panko, egg in a medium bowl. Season with salt and pepper and mix with your hands (avoid over mixing!) Form into 3 or 4 patties and place on the prepared baking sheet. Refrigerate for at least 20 minutes.
Preheat the oven to 375 degrees F.
Bake the burgers, flipping once halfway through, until the internal temperature of a burger reaches 165 degrees F, 30 to 35 minutes.
Meanwhile, make the harissa yogurt sauce: Combine all the ingredients in a small bowl and stir. Refrigerate until ready to use.
Spread some of the sauce on the buns, then fill with the turkey patties, baby spinach and red onions.