Ingredients: 1 tbsp butter 1 tbsp vegetable oil 500 g (1.1 lbs) lamb (not too lean – neck is best, but shoulder works well too, cut into bite-size chunks) 2 brown onions , peeled and sliced thinly 1 heaped tbsp plain (all-purpose) flour (use gluten-free plain flour if required) 480 ml (…