Move oven rack to top position and second oven rack to the middle position.
Preheat oven broiler.
Place poblano pepper on a baking sheet. Place under broiler until blackened, flip over, bake on other side until blackened. Remove from oven, lower oven heat to 350.
Place pobalno in a bowl, cover with plastic wrap, steam for ten minutes. Remove from bowl, rub off the black skin and remove the stem.
Add the pobalno and remaining ingredients to a food processor. Process until smooth, pour into a baking dish.
Bake at 350 on the middle rack until warm and bubbly, about 20 minutes, serve warm.