Drain 2 cans (4 oz. each) whole green chilies and lay an equal portion on a quarter section of each of 8 packaged crêpes (9 in.). Mound 3 tablespoons shredded cheddar cheese (you'll need 2 cups, 1/2 lb. total) onto chilies on each crêpe.
Fold crêpes in half over filling, then in half again to make a triangle. Set triangles, 3-layer side down, slightly apart in 2 nonstick or lightly oiled 10- by 15-inch pans.
Top crêpes with remaining cheese and bake in a 400º oven until filling is hot in the center and crêpe edges are crisp, about 6 minutes; switch pan positions after 3 minutes. Transfer crêpes to plates.