Heat a pan one third filled with vegetable oil for deep-frying, until a crumb will sizzle gently in it. (CAUTION: Hot oil can be very dangerous. Do not leave unattended.)
Deep-fry the tortilla triangles for 30 seconds to one minute, or until golden, and then carefully remove and drain on kitchen paper.
For the bean dip, blend the beans, garlic, olive oil and seasoning in a food processor until smooth. Transfer to a dish.
For the tomato dip, blend the tinned tomato, tomato sauce and chilli powder in a food processor until smooth. Transfer to a dish.
Serve the tortilla chips alongside the dips and serve each with the yoghurt sprinkled with fresh coriander.