1 Rinse tomatoes and cut into pieces.
2 Peel onion and garlic. Thinly slice a few onion rings for a garnish and set aside. Roughly chop the remaining the onion along with the garlic.
3 Peel and coarsely chop horseradish.
4 Using an electric juicer, juice tomatoes, horseradish, onion and garlic. Fill a glass with ice cubes and pour in juice. Serve immediately, garnished with reserved onion rings.