Preheat your slow cooker to low or preheat the oven to 150C, fan-forced. Coarsely chop the onion. Put the lamb in a bowl. Scatter with 1 tbs plain flour, season with salt and pepper and toss to coat.
Step 2 — Brown lamb
Heat 2 tsp olive oil in a medium frypan (if using a slow cooker) or a medium flameproof casserole dish over high heat. Shake the excess flour from the lamb, reserving the flour. Cook the lamb, turning regularly, for 3-4 mins until browned. Remove the pan or dish from the heat.
Step 3 — Slow cooker method
If using the slow cooker, combine the lamb, onion, tomato paste, kofta seasoning, reserved flour and 300ml boiling water in the slow cooker bowl. Cover and cook on low for 8 hours.
Step 4 — Oven method
If using the casserole dish, add the onion, tomato paste, kofta seasoning, reserved flour and 430ml (1¾ cups) boiling water to the lamb in the dish and stir to combine. Bake, covered, for 3½ hours or until the lamb is tender.
Step 5 — Cook rice
About 15 mins prior to serving, rinse the rice until the water runs clear. Put in a small saucepan with 250ml (1 cup) water, cover and bring to a simmer over medium heat. Reduce the heat to low and cook for 12 mins or until tender and the water is absorbed. Turn off the heat and stand, covered, for at least 5 mins. Fluff the rice with a fork.
Step 6 — Serve up
Trim the lettuce, then separate the leaves. Combine 2 tsp olive oil and 1 tsp red wine vinegar in a large bowl and season with salt and pepper. Add the lettuce and toss to coat. Taste the lamb mixture and season with salt and pepper. Divide the rice, lamb mixture, lettuce and hummus among bowls. Enjoy!