White Cheese Dip

4 fresh anaheim chiles
2 T vegetable oil
1 yellow onion, peeled and chopped
2 cloves garlic,finely chopped
1 lb. grated white cheddar cheese
1 T sour cream

Char the chiles over a flame or in the broiler. Place in a paper bag to steam off the skin. Rub off the skin, stem, seed and coursely chop. Heat vegetable oil in a large pan. Add onion, garlic and cook slowly until transluscent. Add chiles and cook 10 min. Reduce the heat to low, add the cheese stirring constantly until cheese melts. Be careful to keep the heat low or else the cheese will "seize" and becomes stringy. Stir in the sour cream. Serve hot with tortilla chips