Ingredients:
2 Tbsp extra-virgin olive oil
1 cup peeled and finely minced yellow onion
2 Tbsp very finely chopped fresh rosemary
2 lb ground turkey
2 lb ground beef
1 Tbsp coarse salt
1 Tbsp freshly ground black pepper
3 cups coarsely grated cheese of your choice

Directions:
1. Heat oil in a small skillet over low heat. Add onion and rosemary; cook until soft and sweet,
    about 10 minutes. Let onion mixture cool a bit, then put in a large mixing bowl with turkey,
    beef, salt, and pepper. 

2. Combine ingredients thoroughly. Divide mixture into patties. Place 2 Tbsp cheese on one patty;
    place other patty on top, pinching edges together. Repeat with remaining patties.

3. Preheat grill to high. Cook burgers 5 minutes on one side; flip, then cook until burgers are
    browned and firm, about 4 minutes. 

4. Serve on buns with all your favorite fixings.

Serves: 8