I hope you mean vegetarian lasagne, though it might explain the stories I've read about it.
I've been in 6 Wetherspoons, each is etched indelibly on my mind. The worst for cleanliness was probably in Carlisle, the food on the floor looked to have been there for several days, if it was freshly fallen on the floor then I feel sorry for whoever had been trying to eat it. The last one was Bristol next to Temple Meads, it was late after a gig and I wanted coffee prior to my train home. Again the tables were dirty, this was despite there being more bar staff than customers. I remember phoning my mom to let her know I'd made the train, it being the last one. Even though I was talking quietly my voice was echoing around the place, the few people who were there were just staring blankly into space. I just drank the black liquid as fast as I could and disappeared into the night.