The King's former chef has revealed some of the monarch's dietary quirks - including his environmentally friendly rule on strawberries.
Carolyn Robb, who worked for Charles for 11 years from 1989, recalled how everything has to be in season when it came to his meal choices.
He also keeps his meat consumption to a minimum, and uses leftovers to feed his chickens every morning.
Speaking ahead of the Coronation, she also praised Charles as a "kind, understanding person who gets things done".
The monarch is set to be crowned alongside Queen Camilla on Saturday in a ceremony watched by millions around the globe.
Sharing her favourite memories of the King, Ms Robb told OK! Magazine : "Charles always had a modest amount of meat in his diet and everything had to be in season – so no imported strawberries in December.
"These are things we now understand as being far better for the environment. I’d prepare home cooking with the freshest ingredients. Leftovers would go into a quiche the next day.
"Scraps that were safe for chickens to eat went into the ‘chicken bucket’ and every morning he would go out and feed them.
"Charles is going to be amazing as King. He’s a kind, understanding person who also gets things done.
"I’ve never, met anyone so hard working, yet he’d still find time to write little notes saying ‘Thank you, that was delicious.’"
The chef's comments come after a book about Prince Philip, called Rebel Prince, detailed how Charles had no idea what cling film was, and apparently "shrieked" the first time he saw it.
According to Tom Bower, one of Philip's gripes about Charles was his disconnect with the regular world, which was never clearer than when he struggled with the cling film.
Thankfully, wife Camilla Parker Bowles was there to settle his nerves.
The book reads: "He walked into the dining room and shrieked. Fearing the worst, Camilla dashed in after him. ‘What’s this?’ asked her husband, pointing at the food.
"'It's cling film, darling,' she replied."
The segment was first published in the Guardian, but Clarence House declined to comment on the book's release.
Without official comment, we don't know whether Charles really did squeal at discovering cling film – or indeed other stories from Rebel Prince are fact or fiction.
Other highlights from Bower included Charles' penchant for changing clothes – allegedly up to four times a day – and his 120-strong staff.
The former Prince of Wales also has a strict ritual as to how he likes to spend his day, with his former press secretary revealing all about how he skips lunch but takes a pause at 5pm for sandwiches, before working up until midnight.
While the King is known to enjoy the finer things in life, he can be fussy about all manner of things - from having his shoelaces ironed to extra requests on how he likes to have his bath water.
A clip previously shared of Charles before his first Changing of the Guard also gave a glimpse into how particular he can be, as it showed him becoming visibly frustrated over a tray pen getting in the way of him signing papers at a desk.
