Preheat oven to 400°F. Char chilies over gas flames or in broiler until blackened on all sides. Enclose in paper bag; let stand 10 minutes. Peel, seed and chop chilies.
Butter 13x9x2-inch glass baking dish. Sprinkle garlic over bottom of dish. Arrange 1/4 of potatoes in dish. Sprinkle with salt and pepper, then with 1/3 of chilies and 1/3 of cilantro. Repeat layering of potatoes, chilies and cilantro 2 more times, seasoning potatoes with salt and pepper. Top with potatoes. Pour broth over, then cream. Sprinkle with salt and pepper.
Tent dish with foil. Bake until potatoes are tender, about 1 hour 15 minutes. Uncover. Sprinkle cheeses over potatoes. Bake until liquid thickens, about 15 minutes. Cool slightly. Sprinkle with cilantro.
Serves 10.

From:Bon Appétit, November 1997  Via: Epicurious Food
Posted By: Pepper Fool
Post Date: 11/20/98