Preheat the oven to 220C, fan-forced. Line an oven tray with baking paper. Cut the unpeeled sweet potato into thin wedges. Thinly slice the tomato.
Step 2 — Cook sweet potato wedges
Put the sweet potato wedges on the lined tray. Drizzle with 2 tsp olive oil, season with salt and pepper and toss to coat. Roast for 22-24 mins until golden and tender.
Step 3 — Cook fish
Meanwhile, season the fish with salt and pepper. Heat 2 tsp olive oil in a medium frypan over medium heat. Cook the fish for 3½-4 mins each side until browned and cooked through. Scatter the dukkah over the fish, then remove from the pan.
Step 4 — Toast rolls
While the fish is cooking, halve the bread rolls through the middle. Put on an oven tray, cut-side up, and bake for 3-4 mins until lightly toasted.
Step 5 — Dress salad leaves
Combine 2 tsp extra virgin olive oil and 2 tsp white wine vinegar in a large bowl and season with salt and pepper. Add the salad leaves and toss to coat.
Step 6 — Get ready to serve
Spread the rolls with the aioli. Fill with the fish, tomato and half the salad. Divide the burgers, sweet potato wedges and remaining salad among plates to serve.