Welcome,
There is an entire sub-forum devoted to LC vegetarian here, check my recent post about 'how to':
http://forum.lowcarber.org/forumdisplay.php?f=109 there are a couple of different resources within this thread, the recipes from Libby at DitchTheCarbs are always good. I made one of her versions of Fathead Pizza last night.

It isn't difficult to be LC vegetarian if you will eat eggs, dairy, and particularly continue to eat fish. Check the Recipe sub-forum here too,
Check Pinterest for Low Carb Vegetarian and use the filter functions for Recipes on DietDoctor, you can even find vegetarian by carb strictness level. https://www.dietdoctor.com/low-carb/recipes/vegetarian

All the best,