Blanch asparagus in boiling water until almost tender. Drain and place in greased shallow baking dish. Sprinkle pimientos over asparagus. In a small saucepan, heat milk and cheeses, stirring until smooth. Pour over asparagus. Combine butter and bread crumbs. Sprinkle over asparagus. Bake at 325F for 30 minutes or until crumbs are brown.