Prepare pasta according to package directions.
Heat olive oil over medium heat. When it is hot, add onion and sauté until just beginning to soften. Add garlic and zucchini. Cook for 2 to 3 minutes, then add chicken strips and taco seasoning.
When chicken is warm and veggies are tender, add salsa, alfredo or cheese sauce, and olives. Heat a few more minutes.
Add pasta to the pan, continue cooking until evenly heated.
To serve, sprinkle with cheese and fresh cilantro, and garnish with a small dollop of sour cream.