Tray-baked lahmacun with tortillas

For the Meat Mixture:

400 g ground beef (or mixed with lamb) 1 large onion 2 garlic cloves 1 red bell pepper 2 medium tomatoes 2 tbsp tomato paste ½ bunch parsley 1 tsp paprika ½ tsp cumin Salt Pepper 3 tbsp olive oil

For the Assembly:

6 tortillas 2 tbsp tomato paste 1 tbsp mustard 3 tbsp water 300 g Greek strained yogurt 3 tbsp olive oil ½ liter sunflower oil (for frying)