Preheat the oven to 200°C/180°C fan. Chop the cauliflower into small florets. Bring a large pot of water to a boil. Add the cauliflower and cook, covered, for 10-12 min until soft. Drain. 

Meanwhile, peel and finely chop the onion and garlic. Peel and grate the carrot. 

Heat a pan over a medium-high heat with a drizzle of oil. Fry the beef mince and onion with a pinch of salt for 5-7 min. Add the garlic and tomato paste. Add the grated carrots, tomato passata, ketchup, marmite, stock cube, Worcestershire and pepper. Reduce the heat to low. Cover with a lid and simmer for 15 min.

Meanwhile, once soft, add the cauliflower, cheddar and butter to a food processor. Blitz for 1-2 min until smooth. Season generously with salt and pepper.

Add the green peas to the beef. Season with salt and pepper. Pour the beef into a baking dish. Spoon the cauliflower over the top. Smooth the surface with a spatula. Bake for 20 min. 

Meanwhile, chop the broccoli into florets. Once baked, set the pie aside to rest for 5 min. Meanwhile, cook the broccoli in lightly salted boiling water for 5 min or until tender. Drain once cooked. Serve the broccoli along side the pie.