For years, Chef Carolyn Robb cooked for the royal family and says Princess Diana definitely helped refine Prince William's palate.
"Princess Diana would decide what the boys were going to have to eat," Robb told "Extra." "They had their say sometimes as well for a treat. The thing William loved most of all was vanilla ice cream and chocolate sauce."
As for the upcoming royal wedding menu, Robb speculated, "It'll be modern British, with emphasis possibly on organic but certainly locally produced ingredients. I think it will be every fresh, seasonable and quite simple, but only the best quality ingredients."
What's the one thing Chef Robb says definitely won't be on the menu? "When planning a royal menu, there is one really big no-no and that's garlic."