Preheat oven to 400 degrees F.
Bring a medium skillet to medium-high heat and add vegetable oil, then onion and sauté for 3-4 minutes
or until onion is translucent. Add chicken and enchilada sauce and cook for 5 minutes or until warmed
On a baking sheet lined oven save platter, layer one-third of the tortilla chips and top with one third the black beans, chicken mixture and shredded cheese. Repeat two more times.
Place baking sheet in the oven and bake 10-12 minutes or until the cheese is melted and chips are lightly browned along the edges. Remove from oven and top with avocado, cotija cheese, olives, black olives, green onion and pickled jalapeno. Drizzle with sour cream and serve immediately with salsa on the side.