Step 1
Combine mince, breadcrumbs, egg, onion and 1 tablespoon sauce in a large bowl. Shape mixture into four 2cm-thick patties.
Step 2
Heat a greased barbecue plate and chargrill on medium-high. Cook patties on plate for 4 to 5 minutes each side or until cooked.
Step 3
Meanwhile, cook bacon and pineapple with patties on barbecue plate for 1 to 2 minutes each side or until browned. Spray cut sides of buns with oil. Cook on chargrill for 2 minutes each side or until browned.
Step 4
Spread bun bases with mayonnaise. Top with lettuce, pineapple, patties, cheese and bacon. Drizzle with remaining barbecue sauce. Sandwich with bun tops. Serve.
Step 1
Preheat oven to 200°C/180°C fan forced. Lightly dust an baking tray with flour.
Step 2
Sift the flour, baking powder, sugar and bicarb into a large bowl. Add the butter then use your fingertips to rub the butter into the flour mixture until the mixture resembles coarse crumbs. Make a well in the centre. Pour in the buttermilk. Use a flat-bladed knife in a cutting motion to mix until evenly incorporated and mixture just begins to hold together. Turn onto a lightly floured surface and gather together dough. (Do not knead.)
Step 3
Press the dough into a 2cm-thick rectangle. From 1 short end, fold over one-third to cover the centre third then fold over from the other short end to cover and make 3 layers. Press out the dough to an 18cm square and lift onto prepared tray.
Step 4
Dust a large sharp knife with flour. Cut the dough into 9 squares, cleaning and dusting the blade between cuts. Brush the tops of the dough with extra buttermilk. Season with salt. Bake for 18 minutes or until risen and golden. Transfer to a wire rack to cool slightly. Serve warm or at room temperature with extra butter.