I've roasted beets, pickled them, grated them in a salad and even eaten them raw. But I never thought to grill them. Until now.
Salt & pepper
Prepare grill at its highest temperature.
Cut off the stem and root ends. Place beets on either flat surface and cut 1" thick. Remove the skin, then rub with olive oil and season liberally with salt and pepper.
Grill on high for about 5-8 minutes per side. You're looking for a good char on the outside and still firm on the inside.
Note: Save those beet greens! You can sauté them in some olive oil with garlic, salt & pepper or tear them up and add to salads.