Step 1 Preheat oven to 190°C. Place potatoes, courgettes and rosemary in a large baking dish and drizzle over 2 tablespoons oil. Season with salt and pepper, then roast for 40 minutes or until golden and tender.

Step 2 Meanwhile, heat remaining 1 tablespoon olive oil in a large frying pan. Add onions and fry gently for 15-20 minutes until soft and golden. Add vinegar and sugar and fry for 5 minutes until soft and melting. Tip into a dish and keep warm.

Step 3 Season steaks with salt and pepper, then add to the pan. Fry over high heat for 2-3 minutes on each side. Divide potato mixture among four plates and top each with a steak and a spoonful of onions.