Chilled Beet Soup

1 16-ounce can diced beets (I use about 4 beets, boiled 'til fork tender and pealed and diced)
1 slice onion (I use about 1/2 a medium onion)
1 1/2 cups chicken broth (I've had good luck with just water)
1 t sugar
1/2 salt
1/4 pepper
1T lemon juice
dash ground cloves
lemon slices (optional)
sliced green onions (optional)

Put it all in a blender and blend until very smooth. Chill. Use lemon slices and green onions as garnish.