Roasted beets are the yummiest! Trim, peel or not, cut up, toss with a little olive oil, dump on a baking sheet and roast in oven (350° is good, or whatever you're using for another item) until just tender (maybe 30-60 minutes, depending on size and temp). They dehydrate slightly, and caramelize a bit, intensifying their sweetness. Can do other veggies--potatoes, sweet potatoes, onions, carrots, asparagus, cauliflower--the same way and even at the same time; just don't mix the beets together with them or all the veggies will be spotted red! Unless you're using yellow beets, of course, then go ahead and mix together.
Now I'm off to add fresh beets to my grocery list.
yum