Cook the Beef Filling:
Heat a pan over medium heat and sauté the onion and garlic until soft and fragrant.
Add the beef mince and cook until browned, breaking it up with a spoon.
Stir in the chilli powder, cumin, paprika, oregano, salt, and pepper. Cook for another minute until fragrant.
Move the beef mixture to the side of the pan, then add the tomato paste directly onto the pan’s surface. Let it cook for 30 seconds before mixing it into the beef.
Stir in the diced tomatoes and let the mixture simmer for 5 minutes until slightly thickened.

Assemble the Tacos:
Spoon the beef mixture onto half of each tortilla, then sprinkle with cheese and coriander. Fold the tortillas in half to close.

Bake the Tacos:
Lightly brush the tops with olive oil and sprinkle extra cheese over them.
Place the tacos on a baking tray lined with baking paper and bake in a preheated oven at 220°C (fan-forced) for 8–10 minutes, or until the cheese is melted and bubbly.

Serve:
Slice the tacos and serve with a dollop of sour cream (optional). Enjoy!