Just completed a trip in Delta 1. The old BusinessElite menus normally featured an entree option that could be made vegetarian be holding back an optional animal protein (something like a pasta or a risotto usually). I noticed on my recent flights that the protein was an integral part of all four entrees. If a vegetarian booked a last minute flight and couldn't get a special meal, I'm not sure what she or he would do? I suppose there's a salad on the regular meal they could eat.

By the way, the quality of the Delta 1 vegetarian meals has declined dramatically. They're edible, but horrible. I've had much better coach vegetarian meals on delta