In large skillet over medium heat, add cooking oil; when hot add the tortilla strips and cook, flipping often until they browned slightly and slightly crisp
Pour in the salsa and stir to coat the tortilla pieces well; reducing heat to low.
Top the tortilla strips with chicken and cover with shredded cheese. Loosely cover the skillet, allowing the chicken to warm and the cheese to melt. Remove from heat.
Serve immediately.