Preheat oven to 425F

Arrange radishes in a single layer on rimmed baking sheet. Drizzle with olive oil and vinegar and toss to combine (use your hands. It's cool).

In a small bowl, combine sea salt and garlic powder. Sprinkle seasoning evenly on top of radishes and finish with pepper.

Roast in oven for 30 minutes, stirring once.

Remove from oven and transfer radishes to serving dish (be sure to grab all the crispy bits off the pan!) and toss with parsley.

Taste for salt and pepper!