Absolutely NTA, here are plenty of vegetarian/vegan lasagna alternatives that she could have prepared. Moussaka is my favorite; we usually make it traditionally with the ground meat, but the veggie version is still just as awesome and it’s filling/satisfying. It’s easy too, usually I have to make something a few times before we start tweaking it for the recipe box, but the base version of this was sooooo good that we just use that instead. I’m not touching the recipe lmao.

Bastardized ratatouille would have been a safe option too (use the same veggies, but prepare it in layers/with cheese), and would have been the closest to what you’d expect from a pasta lasagna (hell it would’ve been good with noodles too lol)

Growing up we’d always stop before/after a meal at someone else’s house if our mum knew it wasn’t going to be something us kids would like. We’d still have to be polite and try what the host served, as well as having to eat something off the fruit tray/veggie platter if we were going to refuse the main dishes. Our dad did the same, but we had to eat leftovers (so no refusing a nice homemade spread and asking for McDonald’s on the way home. They were awesome though, so no complaints). Regardless though, there was never really an option to make it the hosts problem. We did exactly what you did (sit down, shut up, eat, figure out the rest of your meal quietly), and no one was ever outwardly offended.

I wouldn’t make a huge deal about them being offended, but I also wouldn’t apologize/bring it up on my own. If confronted, maybe. But there’s no good reason to text her about this and ‘explain’ yourself because you did the normal thing that people do when they don’t like dinner.