1. Heat oven to 450 degrees Fahrenheit (230 degrees Celsius).
2. Spray top surface of each pizza crust with nonstick spray and place on a baking sheet.
3. Spread half of salsa on each crust. Top each crust with crushed chips, salmon, onions and cheese.
4. Bake for 10-15 minutes, or until cheese is bubbly and lightly browned.