In a medium bowl, combine salsa, cilantro, scallion, and Southwestern marinade mix. Set aside.
Working in batches, pour a single layer of chips on baking sheet. Very lightly coat with vegetable oil spray. Lightly sprinkle with taco seasoning. Bake for 5 minutes. Repeat until all chips are seasoned.
Serve chips on a large platter with a bowl of the Southwestern Salsa.