01 -
Cook the peppers until the skin is blackened on all sides by grilling, broiling, or using an open flame. Move them into a bowl, cover with a kitchen towel or plastic wrap, and let them sit for 10 minutes to steam.
02 -
After cooling, remove the blackened skin and seeds. Slice the peppers into thin strips (rajas).
03 -
Warm some oil in a skillet at medium heat. Toss in the onion slices and cook them for a few minutes until they soften and turn clear. Add the garlic, letting it cook briefly until fragrant.
04 -
Stir the poblano strips into the skillet with the onions and garlic. Keep cooking everything for another couple of minutes so the flavors mix together.
05 -
Turn down the heat and pour in the crema and milk. Let it cook for a few minutes, giving the sauce time to slightly thicken. Add some salt and pepper based on your taste.
06 -
Mix in the cheese, stirring until it melts completely. Serve the dish while it's still warm.