Directions
<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>Preheat your oven to 200°C (fan 180°C/gas mark 6). Line a large baking tray with parchment paper. This ensures the sweet potatoes roast evenly and don't stick to the tray.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>In a large bowl, toss the peeled and cubed sweet potatoes with 1.5 tbsp olive oil, 1/2 tsp cumin, 1/2 tsp smoked paprika, 1/2 tsp coriander, and cayenne pepper if using. Season generously with salt and black pepper. Make sure all the sweet potato pieces are evenly coated with oil and spices for consistent flavor.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Spread the seasoned sweet potatoes in a single layer on the prepared baking tray, ensuring they don't overlap. Space allows steam to escape, resulting in crispy edges rather than soggy potatoes. Roast in the preheated oven for 20-25 minutes, turning halfway through, until the edges are caramelized and the centers are tender when pierced with a fork.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>While the sweet potatoes are roasting, prepare the black bean mixture. Heat the remaining 1/2 tbsp olive oil in a small saucepan over medium heat. Add half of the diced red onion and cook for 2-3 minutes until softened. Add the minced garlic and cook for another 30 seconds until fragrant, being careful not to burn it as burnt garlic becomes bitter.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>Add the drained black beans to the saucepan along with the remaining ground cumin and smoked paprika. Stir well to coat the beans with the spices. Add 60ml water to the pan, bring to a simmer, and cook for about 5 minutes until the beans are heated through and the flavors have melded. Use the back of a wooden spoon to lightly mash some of the beans for a creamier texture, leaving most whole.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>For the lime crema, combine the sour cream or Greek yogurt with the lime zest, 1 tbsp lime juice, garlic powder, and a pinch of salt in a small bowl. Whisk until smooth and set aside. The acidity of the lime juice helps balance the earthiness of the sweet potatoes and beans.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>When the sweet potatoes are done, remove from the oven. About 2 minutes before serving, warm your tortillas. You can do this directly on a gas flame for 10-15 seconds per side (watch carefully to avoid burning), in a dry frying pan, or wrapped in foil in a 180°C oven for 5 minutes. Warming the tortillas makes them pliable and enhances their flavor.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>To assemble the tacos, place a warm tortilla on a plate and top with a generous spoonful of the black bean mixture, followed by the roasted sweet potatoes. Drizzle with the lime crema, and garnish with the reserved diced red onion, crumbled feta cheese, and fresh cilantro leaves. Serve immediately with lime wedges on the side for an extra citrus burst. The combination of warm filling and cool toppings creates a delightful temperature contrast.</li></ol>