Preheat oven to 200C/gas mark 6. Line a large rimmed baking sheet with grease proof paper.
Heat oil in a large frying pan over a medium heat. Add PEK, onion, garlic and cook until browned. Stir in beans and cook for 2-4 minutes.
Spread tortilla chips on prepared baking sheet. Spoon PEK mixture over tortilla chips and sprinkle with cheese. Bake until the cheese is melted and the chips are toasted.
Serve topped with lettuce, salsa, avocado, coriander, jalapenos and sour cream.