First Step: Prepare Sweet Potatoes and Poblano Pepper Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper. Peel (optional) and dice sweet potatoes into 1/2-inch cubes or slice them evenly. If using, seed and chop the poblano pepper into pieces similar in size to sweet potatoes.

Second Step: Season and Roast In a large bowl, toss the sweet potatoes and poblano (if using) with olive oil, taco seasoning or the spice blend, salt, and freshly ground black pepper. Mix until all pieces are evenly coated. Spread the mixture in a single layer on the prepared baking sheet to ensure even roasting.

Third Step: Roast Until Tender and Caramelized Place the baking sheet in the preheated oven and roast the sweet potatoes for 25 to 40 minutes, flipping halfway through. Roast until the edges are caramelized and slightly charred, and the sweet potatoes are tender when pierced with a fork.

Fourth Step: Prepare Black Beans While the sweet potatoes roast, heat 1 tablespoon olive oil in a saucepan over medium heat. Add finely chopped onions and a pinch of salt; sauté until translucent (5 to 8 minutes). Stir in cumin and chili powder and cook for 30 seconds until fragrant. Add the rinsed and drained black beans along with 1/3 cup water, then cover and simmer for 5 minutes. Remove lid and mash half the beans gently to create creamy texture. Stir in 1 teaspoon lime juice or sherry vinegar, season with salt and freshly ground black pepper. Keep covered until assembly.

Fifth Step: Warm Tortillas and Prepare Toppings Heat the corn or flour tortillas in a dry skillet or directly over a low flame until warm and pliable. Keep them covered with a clean towel to retain moisture. Prepare other toppings such as slicing avocado, chopping onions, cilantro, and jalapeños, and preparing lime crema if using.

Final Step: Assemble the Tacos Spread a generous scoop of the refried black beans onto each warmed tortilla. Top with roasted sweet potatoes, avocado, and additional toppings such as chopped onion, fresh cilantro, cheese, and a drizzle of lime crema or a squeeze of fresh lime. Sprinkle toasted pepitas or add pickled slaw or radishes for extra flavor and crunch if desired.