01 - Preheat oven to 425°F. Line a baking sheet with parchment paper.
02 - In a large bowl, toss the halved radishes with olive oil, minced garlic, sea salt, black pepper, and thyme until evenly coated.
03 - Spread the seasoned radishes in a single layer on the prepared baking sheet, cut side down.
04 - Roast for 20 to 25 minutes, tossing halfway through, until the radishes are golden, tender, and lightly caramelized.
05 - Remove from the oven, transfer to a serving dish, and sprinkle with chopped fresh parsley if desired. Serve warm.