Turkey-Spinach Burgers with Pepperoncini Sauce

Turkey burger on a rustic wooden table background
Prep Time: 
45 min prep time
Number of Servings: 
Serves 4
Recipe Source: 


  • 2 Tbsp extra-virgin olive oil, divided, plus olive oil cooking spray
  • 1/2 cup finely chopped onion
  • 5 oz baby spinach
  • Kosher salt and freshly ground black pepper
  • 1/4 cup plain nonfat Greek yogurt
  • 1/4 cup low-fat mayonnaise
  • 2 Tbsp minced seeded pepperoncini
  • 1 Tbsp liquid from the pepperoncini jar
  • 1 to 2 tsp fresh lemon juice or to taste
  • 1 tsp minced garlic
  • 3 oz crumbled feta cheese
  • 2 Tbsp chopped fresh oregano
  • 1 lb ground turkey
  • 4 whole-wheat hamburger buns, toasted
  • Lettuce and sliced tomatoes for garnish


  1. Heat 1 tablespoon of the oil in a skillet over medium heat. Add onion, and cook, stirring occasionally, until golden brown, about 8 minutes. Increase heat to medium-high, add remaining 1 tablespoon oil and spinach, and cook, stirring, until spinach is wilted. Season with salt and pepper and transfer mixture to a bowl. Chill in refrigerator until cooled to room temperature.
  2. Meanwhile, combine yogurt, mayonnaise, pepperoncini, pepperoncini liquid, lemon juice, garlic, and salt and pepper to taste in a small bowl and set aside.
  3. Preheat grill to medium. Once spinach has cooled, remove it from refrigerator and add feta, oregano, ground turkey, 1/4 teaspoon salt, and 1/4 teaspoon pepper. Mix just until combined and shape into 4 patties, each about 1/2 inch thick.
  4. Spray burgers lightly with cooking spray, and then grill over medium heat until just cooked through, about 6 minutes per side. Spread some yogurt sauce on bottom half of each bun, and then top with lettuce and tomato slices and a burger.
  5. Spoon remaining sauce over burgers and top with remaining bun halves. Serve immediately.
Nutrition Info: 

474 Calories, 31 g Protein, 34 g Carbohydrates, 6 g Fiber, 26 g Total fat (7 g sat, 9 g mono, 4 g poly), 947 mg Sodium, ★★★★★ Manganese, ★★★★ Selenium, ★★ Vitamin B2 (riboflavin), K, Calcium, Iron, Phosphorus, Zinc, Vitamin A, B1 (thiamine), B3 (niacin), B6, B12, Biotin, C, E, Folate, Pantothenic acid, Copper, Magnesium