A delicious savory traditional Mexican dish. The cream tones down the heat of the poblano peppers. Serve with warm corn or flour tortillas
4 large poblano peppers, charred and skins removed
2 tablespoons butter
½ yellow onion, cut into ½ inch slices
½ cup Mexican crema or sour cream
5 ounces melty Mexican style cheese (Oaxaca, Manchego, or Asadero), shredded (about 2 cups)
1 teaspoon chili powder
½ teaspoon Mexican oregano
salt and pepper to taste