01 -
Place diced potatoes into a large pot, cover with cold salted water, bring to a gentle boil, and cook until fork-tender, approximately 15-20 minutes. Drain thoroughly and allow to cool completely to maintain structure.
02 -
Wrap each beet tightly in aluminum foil and roast in a preheated 400°F oven for about 40 minutes or until easily pierced. Once cooled, peel under running water to remove skins and dice into small cubes.
03 -
In a mixing bowl, combine olive oil, balsamic vinegar, Dijon mustard, salt, and pepper. Whisk vigorously until the dressing emulsifies into a thick, glossy consistency.
04 -
Add cooled potatoes and diced beets to the vinaigrette. Gently fold using a spatula to evenly coat without crushing the potatoes or staining the mixture excessively.
05 -
Transfer salad onto a bed of fresh arugula or spinach if using, sprinkle with crumbled feta cheese as desired, and serve chilled or at room temperature.