Preheat the oven to 200°C, fan-forced. Line an oven tray with baking paper. Wash and halve the unpeeled sweet potatoes lengthwise. Put the sweet potatoes, cut side down, on the lined tray. Prick all over with a fork. Spray with oil, season with salt and pepper and roast for 25 mins or until tender.
Cook veggies & beef
Meanwhile, peel and finely chop the onion. Finely dice the capsicum. Heat the oil in a medium-deep frypan over medium-high heat. Cook the onion and capsicum, stirring occasionally, for 4-5 mins until softened. Add the beef mince, season with salt and pepper and cook, breaking up the lumps with a spoon, for 6-7 mins, until well browned.
Finish beef
Add the coriander, cumin and paprika seasoning to the beef mince and cook, stirring, for 1 min or until fragrant. Stir in the stock and cook, stirring occasionally, for 7-8 mins, until the sauce is reduced. Taste, then season with salt and pepper.
Make salad
Meanwhile, thinly slice the cucumber. Put the oil, apple cider vinegar, wholegrain mustard and honey in a large bowl, season with salt and pepper and whisk to combine. Add the mixed green salad and cucumber and toss to coat. Grate the cheese.
To serve
Divide the sweet potato between plates, spoon over the beef mixture and sprinkle with the cheese. Serve with the mixed green salad on the side.