Preheat your oven to 200°C (390°F). Gather a baking sheet, a mixing bowl, and a knife. Prepare your herbs, garlic, and radishes.
Trim the green tops off the radishes and rinse them well under cold water. Pat dry thoroughly with a towel for even roasting.
If your radishes are large, cut them in halves or quarters; small radishes can be roasted whole for more tenderness.
In the mixing bowl, toss the radishes with olive oil, minced garlic, chopped herbs, salt, and black pepper. Ensure each piece is coated evenly and the garlic is fragrant.
Spread the coated radishes in a single layer on the prepared baking sheet, making sure they aren’t crowded. This helps them crisp up nicely.
Place the baking sheet in the oven and roast for 25 to 30 minutes, shaking the pan halfway through. The radishes should turn golden and blister at the edges, filling your kitchen with a fragrant aroma.
Check the radishes with a fork; they should be tender and easily pierced, with a slightly caramelized, smoky exterior.
Remove from the oven and let rest for 5 minutes. Squeeze fresh lemon juice over the radishes for a bright contrast, if desired.
Transfer to a serving dish or serve directly from the baking sheet, garnished with extra herbs if you like. Enjoy the warm, smoky, tender radishes as a cozy side or snack.