Preheat your oven to 400°F (200°C).
In a large mixing bowl, toss the sweet potatoes, bell peppers, and red onion with olive oil, cumin, smoked paprika, salt, and pepper until evenly coated.
Spread the seasoned vegetables in a single layer on a baking sheet lined with parchment paper. Roast in the preheated oven for 20-25 minutes, or until the vegetables are tender and slightly caramelized, stirring halfway through.
While the vegetables are roasting, prepare the black beans. In a saucepan, heat a tablespoon of olive oil over medium heat. Add minced garlic and sauté for about a minute until fragrant.
Add the drained black beans to the saucepan along with lime juice. Stir well and let it simmer for 5-7 minutes until heated through. Season with salt and pepper to taste.
Warm the corn tortillas in a dry skillet over medium heat for about 30 seconds on each side, or until they are soft and pliable.
To assemble the tacos, spoon some of the roasted vegetables and black beans onto each warm tortilla. Top with your favorite toppings such as diced avocado, shredded lettuce, salsa, chopped cilantro, and a squeeze of lime juice.
Serve immediately and enjoy your delicious Roasted Vegetable & Black Bean Tacos!