Buffalo Chicken and Bleu Cheese Sandwich

I received this in a email ages ago. No link so I don't know where it's from.

Buffalo Chicken & Blue Cheese Sandwich
Per sandwich: Calories: 387 • Fat: 15 g • Sodium: 912 mg

Ingredients: Ingredients:

¼ cup crumbled blue cheese
½ cup Greek yogurt
Juice of half a lemon
Salt and pepper to taste
4 (6 oz.) chicken breasts
½ Tbsp. chili powder
1 red onion, sliced
3 Tbsp. Frank’s hot sauce
2 Tbsp. butter, melted in the microwave for 20 secs.
4 large romaine lettuce leaves
4 sesame buns, toasted

Directions: Directions:

1. Preheat a grill or grill pan. While it’s heating, combine the blue cheese, yogurt, and lemon juice, plus a pinch of salt and pepper. Stir to combine, and set aside.

2. Season the chicken breasts with salt, pepper, and the chili powder. Add the chicken to the hot grill and cook for 4 to 5 minutes the first side, then flip.

3. Add the onions to the perimeter of the grill (if using a grill pan, you’ll need to wait until you remove the chicken to grill the onions).

4. Cook the chicken until firm and springy to the touch, another 4 to 5 minutes. Remove, along with the grilled onions.

5. Combine the hot sauce and butter and brush all over the chicken after removing from the grill.

6. Place one large leaf of romaine on the base of each bun. Top with a chicken breast, the blue cheese sauce, grilled onions, and then the top half of the bun.