Preheat oven to 425 degrees F.

Slice the radishes in half and place them on a baking sheet. Drizzle with avocado oil and sprinkle with sea salt, black pepper, and garlic powder. Use your hands to toss everything together until radishes are well-coated in oil and seasoning.

Turn the radishes so that they are all cut-side down.

Roast 18 to 25  minutes, or until the radishes are golden-brown and have some wrinkles. Give the radishes a little shuffle half-way through (I jostle them around with a spatula after 10 minutes of baking). Note: if you'd like to add a few cloves of minced garlic, do so when the radishes have 5 to 10 minutes left in the oven.

Remove radishes from the oven, allow them to cool for a few minutes, then serve!