Lemon-Grilled Beets Beets, peeled, sliced (slightly less than 3/8 inch) Half a lemon, thinly sliced 1 tablespoon olive or vegetable oil Chopped fresh tarragon Salt Pepper Extra-virgin olive oil. Heat grill. Toss beet and lemon slices with 1 tablespoon oil in large bowl. Grill, covered, over medium heat or coals until tender and lightly charred (3 minutes for lemon and 12 to 16 minutes for beets), turning occasionally. Sprinkle with tarragon, salt and pepper; drizzle with extra-virgin olive oil.