Cakes and slices were kicked to the curb in favour of chicken wings, or tuna, tomatoes and avocado on toast. Boiled eggs, cheeses and nuts have also been introduced.
Dilworth is the largest charitable education trust in the country, providing private school education to 640 students in “straitened circumstances”.
The students attend junior and senior campuses in Auckland, while the rural campus hosts year 9 boys.
Needing to lose a little weight himself, Johnston decided to personally test the diet before letting the students and their parents know he was planning to turn their eating habits upside down.
“I did it – and I lost 27 kilos, so it works.”
Losing the weight saw Johnston reverse a number of serious health issues. He is now able to exercise and has become something of a role model to the students.