Heat oil in a large skillet. Add onion, carrots, turnips, zucchini, beets, garlic, cumin and herbs. Saute until vegetables begin to wilt, about 3 to 5 minutes. Allow to cool slightly. Soak oats in water for 5 minutes, then drain and press out excess water. Add to vegetable mixture along with potatoes, hazelnuts and rice. Season with salt and pepper. Form mixture into 8 patties. Grill patties on a well-oiled vegetable grill, or saute in olive oil for 3 to 4 minutes on each side, until golden.