Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius).

Wrap each beet individually in a piece of foil and put them all into a 9×13-inch (23×33-centimeter) baking pan.

Bake for one hour and 20 minutes.

Let the beets cool for about 20 minutes. Peel and dice into small cubes.

In a bowl, combine the beets with the remaining ingredients. Mix and serve! Lasts in the fridge beautifully for up to a week.