Rajas con crema is the name given to a mexican dish consisting of sliced poblano pepper with cream (the name literally means "slices" in spanish). it is very popular in mexico, particularly in the central and southern parts of the country. it is one of the dishes most commonly served during taquizas (taco parties), together with tinga, mole, chicharrón, and papas con chorizo. preparation of the dish involves roasting, peeling and slicing the peppers, sauteing them together with sliced onions, and simmering the mixture with cream. sometimes chicken broth is added for flavor.

Source: Wikipedia