In a separate bowl, combine butter, lemon juice, honey and garlic. Season with Salt and pepper. Add the radishes, tossing to coat them thoroughly. Marinate for at least 10 minutes. Drain the radishes but reserve the marinade.
Take the multicooker, open and unlock the lid by turning the handle to the unlock position. With the lid still open, turn the handle to the lock position.
Press the [MENU SELECTION] button and select the [OVEN] function. Set the cooking time for 15 minutes and temperature for 120 degrees then press [COOK]
Put the marinated radishes into the cooker. Let it cook until they are nicely charred.
Toss the radishes with the reserved marinade. Adjust the seasoning if desire.