Turkey Burger with Pickled Red Onions and Feta

Ingredients

• 3 Tbs chopped herbs (any mix of Parsley, Mint, Oregano and Chives)
• 1 tsp cumin
• 1 tsp ground cinnamon
• Salt and freshly ground pepper
• 1.5 lbs ground turkey
• 1 small red onion, sliced thin
• 1 cup white wine vinegar
• 1 Tbs sugar
• 1 tsp salt
• 8 oz Sliced feta- We recommend French or Greek Sheep’s milk feta
• 4 butter lettuce leaves
• Sourdough buns
• ½ stick softened butter