Hello Mates,
My good suggestions for vegetarians which can be cooked for Christmas?
Depends on what you're looking for. Plates of roasted vegetables stink, but that's all that restaurants think of vegetarians. That and black bean veggie burgers.
One option that my wife makes is rice-stuffed acorn squash. It is delectable. In addition, I would suggest a variety of sides, as well as a good salad. Other main course options include quinoa, rice, beans, lentils, orzo, etc.
Properly cooked tofu is another option, but that definitely depends on the recipe and willingness to cook with tofu.
Pasta is one option, but I'm not a fan of pasta on holidays, unless it's something a little different.
If you like the fake/faux meats, there are a good variety to choose from that can be a main protein source, if you're not doing legumes.
Also, don't pass up a good, hearty soup. There are a lot of butternut squash soups around at this time of year. Very delicious with some pine nuts or pumpkin seeds.