Prepare the dough: Combine bread flour, wholemeal flour, sugar, dry yeast, and water in a large bowl. Mix by hand to form a dough. Add cooking salt and olive oil, knead briefly to distribute.
Knead the dough: Knead dough on a clean workbench for 8-10 minutes until smooth. Place dough in bowl, cover, and refrigerate for 48 hours for slow fermentation.
Divide and prove dough: Remove dough from fridge, divide into 260g portions, roll into tight balls. Place on greased tray with lid and prove at room temperature for 2-3 hours.
Cook beef mince: Heat half the olive oil in a large heavy-based frying pan over medium-high heat. Add beef mince and cook for 8-10 minutes until well browned, breaking up with a wooden spoon.
Cook vegetables: Heat remaining oil in a large saucepan over medium heat. Cook onion and carrot for 5 minutes until softened, seasoning with salt. Add garlic and cook for 1 minute.
Add tomato paste and spices: Stir in tomato paste and cook until darkened, about 2-3 minutes. Add chilli powder then beef stock.
Combine beef and simmer: Add cooked beef mince to saucepan and bring to simmer. Cook for 10-15 minutes until sauce thickens slightly.
Finish sauce: Stir in milk, return to simmer, then remove from heat. Quickly stir in egg yolk to incorporate. Transfer to bowl and set aside to cool.
Preheat oven: Preheat pizza oven to 450°C (840°F).
Shape dough and add toppings: Stretch dough on lightly floured surface to fit pizza peel or baking surface. Spread lasagne sauce over dough, then top with mozzarella slices and Parmesan cheese.
Bake pizza: Bake for 90 seconds to 2 minutes until bottom is crispy and cheese is golden.
Garnish and serve: Sprinkle parsley over pizza, drizzle with olive oil, slice, and serve.