a) Preheat your oven to 220°C/200°C fan/gas mark 7.
b) Heat a large frying pan on high heat (no oil).
c) Once hot, add the beef mince and cook until browned, 5-6 mins. Use a spoon to break it up as it cooks, then drain and discard any excess fat. Season with salt and pepper. IMPORTANT: Wash your hands and equipment after handling raw mince.

a) Meanwhile, halve the pepper, discard the core and seeds, then chop into small pieces.
b) Grate the cheese.
c) Drain and rinse the kidney beans in a sieve.

a) Add the pepper and Mexican style spice mix to the beef mince and stir-fry for 1 min.
b) Mix in the Worcester sauce, tomato passata, kidney beans, beef stock paste and sugar for the sauce (see ingredients for amount).
c) Using the back of a fork, crush half the beans once they're in the pan.

a) Bring the beef and bean mix to the boil.
b) Reduce the heat to medium-low and simmer until thickened, 5-6 mins. IMPORTANT: The mince is cooked when no longer pink in the middle.

a) Meanwhile, lay the tortillas (2 per person) onto a large baking tray in a single layer and rub each with a little oil.
b) Season with salt and bake on the top shelf of your oven until golden and crispy, 4-6 mins.

a) Transfer the crisp tostadas (2 per person) to your serving plates.
b) Top with spoonfuls of the beef and bean mix - as much as you'd like.
c) Scatter over the cheese and spoon on a dollop of soured cream. TIP: Tostadas are best enjoyed eaten by hand - get stuck in! Enjoy!