Possible Clues:

• Extra dishes will offer this bit of salad
• Salad ingredient princess spots outside
• Plant has detective covered in spots
• Part of salad plate given to artist
• Spots detective inside, looking somewhat red-raw with The Greens
• Vegetable bowl depicted by artist
• Pungent root vegetable
• Bit of food is hard to cook
• Root vegetable used in salads
• Component of 17 right to put on a plate?