Chicken Burger with Roasted Poblano and onion

My mom saw this recipe on the Today Show.  It is a Martha Stewart recipe and it is delicious. Not to mention pretty healthy.  What makes this is the poblano and onion mixture that goes on top.  It is oh so good. 

1 poblano chile

4 tsps. vegetable oil

1 large white onion, halved and thinly sliced

salt and pepper

1 1/4 pounds ground chicken breast (yes they have ground chicken breast)

4 slices of cheddar cheese

butter

4 whole wheat burger buns, split

1.  Over a low gas flame or under the broiler, roast chile until charred, about 6 mins., turning frequently.  Place in a bowl and cover bowl tightly with plastic wrap.  Let chile steam 20 mins. then rub with a paper towel to remove skin.  Remove stem and seeds.  Slice chile into  2 inch strips and return to bowl. 

2. In a large skillet, heat 2 tsps. of oil over medium high heat.  Add onion and season with salt and pepper.  Cook until onion is soft and translucent, about 10 mins.  Add onion to bowl with chile and stir to combine. 

3. Form ground chicken into four patties and season with salt and pepper.  ( I also seasoned with garlic salt and cayene in the meat) Heat large non stick skillet or pan.  Add 2 tsps. of oil.  Cook burgers until done.  The last minute or two put on sliced cheese and allow to melt.  

4. Meanwhile put oven on broil.  Butter inside of buns and place on baking sheet buttered side up.  Toast under broiler.  Place burger on buns and top with onion and chile mixture.  

Enjoy!