Spaghetti Taco?

On a corner near my house, a couple sells tacos de guisado out of the back of a pickup truck.  Normally, each guisado is prepared in a tortilla with a small portion of rice.  Yesterday, however, they added spaghetti alfredo (?!?) to my chile relleno before smothering both in a light tomato sauce.  Oh my!  If I only had a camera with me….

México, D.F.