Tunisian Beet Salad

• 1 15 oz can whole beets
• three scallions, thinly sliced, white and green parts
• 3 T finely chopped flat leaf parsley
• 1 large clove garlic, pressed
• 1 t. harissa (if unavailable, use 1 t. ground chile paste and ⅛  t. each ground caraway and coriander)
• 1 T red wine vinegar
• salt and pepper to taste