I add a squeeze of lemon to the “beef and squash tagine” and spoon it into four bowls of brown rice alongside the “creamy, lemony, minty courgettes”. When I plonk them down on the table, my children stare at them in appalled disbelief. My seven-year-old, Joe, promptly bursts into tears, while his six-year-old brother, Marc, bellows in outrage. “Re-vol-ting!” he yells. “No way I’m eating that!”