Possible Clues:

• Seen mostly going after tender mince cooked with potatoes
• Lamb and potato dish
• He prepares dish without a recipe at first, cooking common meal
• Prep dishes? He transformed this dish
• Prep dishes he's cooking for meal
• Peep's dish her undoing? Traditional meat dish
• Traditional meal for those characters from The Nativity Scene and On the Waterfront, for the most part
• One helped by crook views almost meaty dish
• Minced meat dish