For the curry, peel and finely dice the onion. Heat 1 tablespoon of oil in a pot. Fry the onion in it. Stir in curry paste and 1 tsp. Garam Masala and sauté briefly. Add tomatoes and coconut milk, bring to the boil and simmer for about 20 minutes.
Clean and wash the vegetables and cut into longish strips.
Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer). Wash lamb steaks and pat dry. Heat 2 tablespoons of oil in a pan. Fry the steaks on each side for 1-2 minutes over a high heat.
Season with salt and pepper. Wash the rosemary, dab dry, cut up roughly and sprinkle over the steaks. Continue to roast on a baking tray in the oven for 8-10 minutes. Wrap in aluminium foil and leave to rest for 6-8 minutes.
Heat 4 tablespoons of oil in portions in a frying pan. Fry the vegetables in it in portions all around for about 5 minutes. Season with salt and pepper.
Season curry with salt, chilli and lemon juice and serve. Carrot doughnuts or baguette taste good with it.