Preheat the oven to 220℃220 °C or 210 °C fan bake. Line an oven tray with baking paper.
Cook wedges
Slice unpeeled 800 g sweet potatoes into wedges. Spread in a single layer on the prepared oven tray and toss with 2 tbsp Mexican seasoning and 1 tbsp olive oil. Season with salt and pepper and roast for about 22-25 minutes, until tender and golden. Turn once during cooking.
Cook bacon
Roughly chop 300 g bacon. Heat 1 tbsp olive oil in a frypan on high heat. Cook bacon for 6-7 minutes, until cooked and golden brown. Set aside on a paper towel to drain and reserve the pan.
Cook corn
Heat the reserved frypan on high heat and cook 1 cup frozen corn for about 5 minutes, until tender. Set aside in a large bowl to cool.
Make salsa
Adding to the bowl with the corn as you go. Peel and finely dice 1 red onion (if using). Dice 2 tomatoes and 1 cucumber. Drain and rinse 400 g black beans. Add 1 tbsp apple cider vinegar and ¼ cup pumpkin seeds and toss to combine. Season to taste with salt and pepper.
To finish
Remove wedges from the oven. Grate over ½ cup cheese. Return to the oven for a further 2 minutes, or until the cheese has melted.
To serve
Divide the cheese-loaded wedges between plates. Top with the corn salsa, bacon and dollops of sour cream.