1. Roast sweet potato
Preheat the oven to 220C, fan-forced. Line 2 oven trays with baking paper. Cut the unpeeled sweet potatoes into wedges and put on a lined tray. Drizzle with 1 tsp olive oil, season with salt and pepper and toss to combine. Roast, turning halfway, for 25 mins or until golden and tender.
2. Roast tomato and onion
Meanwhile, quarter the tomatoes. Cut the onion into wedges. Put on the remaining lined tray and drizzle with 1 tsp olive oil and 2 tsp balsamic vinegar. Scatter over 2 tsp sugar, season with salt and pepper and toss to coat. Roast for 5 mins.
3. Roast sausages
Add the sausages to the tray with the tomato and onion. Roast for a further 15 mins or until the onion is tender and the sausages are cooked through.
4. Make dressing
Combine 2 tsp olive oil and 2 tsp balsamic vinegar in a large bowl and season with salt and pepper. Add the salad leaves and toss to coat.
5. Serve up
Divide the salad among plates and top with the roasted tomato, onion and sausages. Serve with the sweet potato wedges and enjoy!
6. Make it yours
If you have any bread rolls or a baguette on hand, this makes the ultimate sausage sub.