- Boil new potatoes in salted water for 15–18 minutes until just tender, then drain and allow to cool slightly before halving.
- While potatoes cool, combine mayonnaise, Dijon mustard, honey, and sliced spring onions in a bowl. Fold in the warm potatoes, season well, and refrigerate until serving.
- Mix beef and pork mince with garlic powder, 1 tbsp BBQ sauce, salt, and pepper. Divide into 2 equal patties, pressing a shallow indent in the centre of each to prevent puffing.
- Grill or pan-fry patties over high heat for 3–4 minutes per side. In the final minute, brush tops with remaining BBQ sauce and lay Red Leicester slices over each patty to melt.
- Toast the cut sides of the brioche buns in the pan or on the grill for 1–2 minutes until golden. Spread a little extra BBQ sauce on the base.
- Whisk together apple cider vinegar, remaining honey, and olive oil with a pinch of salt to make the dressing. Toss rocket and halved tomatoes in the dressing just before serving.
- Assemble burgers by placing the cheesy patty on the base bun and topping with the lid. Plate alongside the potato salad and dressed rocket and tomato salad.
Tip: For the juiciest patties, use a 70/30 lean-to-fat ratio mince and avoid overworking the meat when mixing — handle it just enough to combine the seasoning, then shape gently.