Peel sweet potatoes and cut them into 1.5-cm [3/4-inch] dice. Place in a bowl with olive oil, smoked paprika and salt. Toss well until the sweet potatoes are coated all over. Spread on a baking tray and cook for 25mins until soft.
While the sweet potatoes are roasting in the oven, prepare the avocado mayo and charred corn salad (see links to recipes in the ingredient list above).
Once everything is ready, top the tortillas with some roasted sweet potatoes, charred corn salad and avocado mayo.
If using, serve with some freshly chopped coriander, lime juice and sliced red chilli.