Slow Cooker Lamb and Sweet Potato Mafé Step-by-step instructions

Before you start

Before beginning, ensure your slow cooker is clean and positioned on a stable, heat-resistant surface. Peel and dice your sweet potatoes into uniform one-inch cubes to ensure they cook evenly. Thinly slice the onion to allow it to melt into the sauce.

If your lamb is in a large roast, trim any excessive surface fat and cut it into consistent one-inch cubes. Have your peanut tomato broth measured and ready to pour, ensuring you have enough to submerge the ingredients properly for the best results.

Instructions

Layering the Ingredients

1. 1Prepare and Layer the Ingredients
   Place the cubed lamb pieces into the bottom of the slow cooker ceramic insert. Scatter the diced sweet potatoes evenly over the lamb. Top with the sliced onions to ensure they soften thoroughly during the long cooking process.
   Look for The slow cooker base should be filled with the solid ingredients layered evenly.
   Tip Ensure the lamb pieces are uniform in size to promote even cooking throughout the process.

At this phase, your slow cooker should be organized with the lamb at the base, followed by the sweet potatoes and onions. This layering is crucial as it places the meat in the direct heat zone at the bottom, while the vegetables soften in the steam and broth as they cook. Verify that all ingredients are evenly distributed to ensure every bite is balanced.

Slow Cooking the Stew

2. 2Add Broth and Slow Cook
   Pour the peanut tomato broth over the layered lamb and vegetables. Cover the slow cooker with its lid and set to low. Cook for approximately 4 to 6 hours, or until the lamb is tender.
   Look for The broth should just cover the ingredients to allow for gentle braising.
   Tip Avoid lifting the lid frequently, as this releases heat and increases the required cooking time.

During this phase, the aroma of the lamb and peanuts will fill the kitchen. The ingredients should be simmering gently. Check that the liquid level remains consistent; it should be bubbling softly around the edges. This phase is entirely hands-off, allowing the flavors to develop and the lamb to tenderize. Ensure the lid remains tightly closed to maintain the necessary heat and moisture for the braising process.

Finalizing and Serving

3. 3Finish and Serve
   Check that the lamb reaches an internal temperature of at least 145°F (63°C). Once cooked, let the meat rest for 5 minutes before serving. Serve the finished mafé hot alongside a portion of steamed white rice.
   Look for The sauce should be glossy and thickened, and the lamb should be tender enough to cut with a fork.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip If the sauce is too thin, you can remove the lid for the last 30 minutes to reduce it.

In the final phase, the sauce should have achieved a rich, thick, and glossy texture. The lamb should be tender and easily pierced with a fork. Ensure the internal temperature has reached the safe threshold.

The colors should be deep and appetizing, with the sweet potatoes having absorbed the vibrant hues of the peanut tomato broth. Once ready, the dish should be served steaming hot, typically over a bed of fluffy white rice.

Common mistakes

A common mistake is overcrowding the slow cooker, which can prevent even heating. Ensure there is enough space for the broth to circulate. Another frequent error is using a peanut butter with added sugar or sweeteners, which can alter the savory profile of the dish; stick to natural, unsweetened varieties.

Finally, do not skip the resting period after cooking, as this allows the juices to redistribute, ensuring the lamb remains moist and flavorful instead of becoming dry upon serving.

How to tell it’s done

The dish is considered done when the lamb reaches an internal temperature of at least 145°F (63°C). At this stage, the meat should be fork-tender, meaning it yields easily when pressed.

The sweet potatoes should be soft but still hold their shape, and the sauce should have thickened into a glossy, coating consistency. Always use a meat thermometer to verify the temperature of the largest piece of lamb to ensure it is cooked through and safe to eat.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest