Gotta have beetroot!
Pickles always good too. Otherwise, whatever's going, always grated carrot, usually some lettuce snatched from the garden a few minutes prior! Tomoato, snow pea sprouts, maybe avocado.
Super-fresh tahini or soy mayo.
Roasted vegies and/or fresh herbs if I'm lucky.
And if I'm being particularly decadent, a slab of sandwich tofu.