Jalapeno Popper Chicken Casserole

olive oil

small onion, diced

jalapeno peppers, diced (seeds and ribs removed)

garlic, minced

coarse salt and fresh black pepper

+ 1/2 pounds boneless chicken breasts, cut into bite size pieces

fresh tomatoes, diced (seeds removed)

+ 1/2 cups corn kernels

Sauce:

butter, plus more for greasing the pan

flour

+ 1/2 cups whole milk

cream cheese

+ 1/2 cups sharp white cheddar, shredded

For topping:

crushed tortilla chips, plus more for serving

cooked couscous, rice or quinoa, for serving

sour cream, for serving