Nina's Russian Cold Beet Soup (Kholdnyk)

Ingredients (7)

• + 4 cups fat-free buttermilk add to pantry
• + 1 cucumber - peeled, seeded, quartered lengthwise and diced add to pantry
• + 1 (15 ounce) can sliced beets with liquid add to pantry
• + 3 green onions, chopped add to pantry
• + 2 tablespoons chopped fresh dill add to pantry
• ✓ ½ teaspoon salt, or to taste
• ✓ 2 tablespoons white vinegar, or to taste