Another recipe from RisaG.

Turkey Burgers with Chipotle-Chili Tartar Sauce

Tartar Sauce:
3/4 cup mayonnaise -- I used reduced fat
2 tbsp extra-virgin olive oil
2 tbsp red onion -- minced
2 tbsp fresh dill -- chopped
1 tbsp chipotle en adobo -- minced
1 tbsp capers -- drained

Burgers:
1 lb ground turkey
4 whole wheat burger buns -- split
4 red onion slices
4 plum tomato slices
2 bunches arugula -- about 1 oz*

Whisk first 6 ingredients in small bowl. Season with salt and pepper (Sauce can be made 2 days ahead. Cover and chill.) Form turkey into burgers. Sprinkle a bit of salt and pepper on them and rub it in. Plug in George Foreman Grill or another grill. When hot, spray with some cooking spray. Place burgers on grill and close. Cook until no pink comes out when poked, around 8 minutes (sometimes less). Toast buns. Spread 1 tbsp sauce on bottom half of bun. Top with a burger than 1 more tablespoon sauce. Top each with 1 onion slice, 1 tomato salice and 1/2 bunch arugula. Cover with bun tops. Serve, passing remaining chipotle chili tartar sauce.