Reserving marinade, drain and chop artichokes.
Sauté onions in 1 to 2 Tbsp reserved marinade until softened, but not browned.
In a mixing bowl combine chiles with mayonnaise. Blend in plain and marinated artichokes and onions. Fold in 1 cup Cheddar cheese. Spread in greased ovenproof serving dish. Bake at 350° F for 10 minutes or until heated through.
Sprinkle remaining cup of cheese over top and bake another 10 minutes.
Serve hot with tortilla chips. This can be made ahead and refrigerated.Servings: