(Lasagna or lasagne? I never know how to spell it.) In any case, vegetable lasagne is easy and delicious. Here's a variation on the classic red sauce version of vegetarian lasagne, with some extra vegetables.
Like all beans and legumes, lentils are an excellent source of vegetarian protein. Unlike the others, lentils do not need to be soaked before cooking, so they are quick and easy to prepare - and delicious to boot.
Nuts are an excellent source of vegetarian protein, and they taste great too! Here are some vegetarian recipes featuring nuts, including breakfast, salads, main courses, and desserts, as well as tips on making your own nut butters, milks, and creams.
Celeriac, aka celery root, is a knobbly, weird-looking vegetable that hides a uniquely earthly creaminess under its ugly skin. It takes a bit of work to peel but it's well worth it.