This is a nearly dairy-free version of the cauliflower mash, with more depth of flavor. It contains butter, but my body doesn't react badly to butter the way it does to cheese and cream. Stands up well against gamier meats, like venison.
1 head cauliflower, chopped
1 small bulb garlic, peeled
1-2 turnips, peeled & diced
Celery root (2), peeled & diced
1/2 stick butter
salt & pepper
Steam or boil vegetables until tender. Drain. Masticate veggies until creamy using a boat motor or food processor. Add butter and season with salt and pepper.