Preheat the oven to 240°C/220°C fan-forced. Cut the sweet potato into wedges. Place on a lined oven tray. Drizzle with olive oil, season with salt and toss to coat. Spread out in a single layer and bake until tender, 25-30 minutes. TIP: If your oven tray is crowded, divide the wedges between two trays.

While the wedges are baking, pat the haloumi dry with paper towel. Slice the haloumi into 2cm-thick slices (2 per person). Thinly slice the brown onion. Thinly slice the tomato.

In a medium frying pan, heat a drizzle of olive oil over a medium heat. Cook the onion, stirring regularly, until softened, 5-6 minutes. Add the balsamic vinegar (for the onion), the water and brown sugar, then mix well. Cook until dark and sticky, 3-5 minutes. Transfer to a small bowl.

Wash and dry the frying pan, then return to a medium-high heat with a drizzle of olive oil. When the oil is hot, cook the haloumi until golden, 1-2 minutes each side.

Place the bake-at home burger buns on a wire rack in the oven. Bake until heated through, 3 minutes. While the buns are baking, reserve a handful of the mixed salad leaves for the burgers, then place the rest in a medium bowl. Combine with the balsamic vinegar (for the salad) and a drizzle of olive oil. Season to taste.

Cut the buns in half and spread the bases with the creamy pesto dressing. Top with the reserved mixed salad leaves, tomato slices, haloumi and caramelised onion. Serve with the sweet potato wedges and salad.