Heat the oil in a pan and fry the mince. Peel onions and garlic and dice finely. Add 2/3 of the diced onions and garlic to the minced meat. Season minced meat with salt, chilli and oregano.
Fold in baked beans. Heat a pan. Heat the tortillas for 30 seconds on each side and immediately turn them into bags. Fill with the minced bean mixture and place on a baking tray lined with baking paper.
Sprinkle with cheese. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 6-8 minutes. Arrange on a plate, sprinkle with remaining onion cubes and garnish with oregano.