Chicken a la Crema
Poblano peppers are like regular green peppers, except thinner, more flavorful, and with a little bit of heat. If you can find them, use them, but if not, any pepper will do.
Diced fresh tomato can be used in place of canned, and you can substitute 2 teaspoons table salt for 1 tablespoon kosher salt. Feel free to use any herbs you like.
Sour cream can be used in place of creme fraiche, but it's more acidic, will make the sauce tangier, and may curdle.
You can serve the chicken on the bone if you'd like.