Bring a medium saucepan of salted water to the boil. Peel potato and cut into large chunks. Cook in the boiling water until easily pierced with a fork, 12-15 minutes. Drain and return to pan. Add the butter and milk and season generously with salt. Mash until smooth. Cover to keep warm. TIP: Save time and get more fibre by leaving the potato unpeeled!

While potato is cooking, thinly slice carrot into half-moons. Chop broccoli (including the stalk!) into small florets. Finely chop garlic. Crush black peppercorns with a pestle and mortar, or in their sachet using a rolling pin. Place your hand flat on top of each chicken breast and slice through horizontally to make two thin steaks. Season with salt on both sides.

In a large frying pan, heat a drizzle of olive oil over medium-high heat. Cook the carrot and broccoli with a splash of water, tossing, until just tender, 6-8 minutes. Add 1/2 the garlic and cook until fragrant, 1 minute. Season with salt and pepper. Transfer to a bowl and cover to keep warm.

Return frying pan to medium-high heat with a drizzle of olive oil. When oil is hot, cook chicken until cooked through, 2-4 minutes each side (cook in batches if your pan is getting crowded). Transfer to a plate to rest. TIP: Chicken is cooked through when it's no longer pink inside. TIP: Cook the chicken in batches for best results!

Return pan (don't wash it out!) to medium heat with a drizzle of olive oil. Cook crushed peppercorns and remaining garlic until fragrant, 30 seconds. Reduce heat to low, then add a dash of water. Scrape up any bits stuck to the bottom of pan, then add light cooking cream and chicken-style stock powder. Cook, stirring, until thickened and fragrant, 2-3 minutes. Stir in any chicken resting juices.

Divide chicken, mash and garlicky veggies between plates. Drizzle with creamy peppercorn sauce to serve.