In a microwave-safe bowl, mix cashew butter, olive oil, vanilla, and salt.
Microwave on HIGH 1 minute.
In a separate bowl, combine cereal, oats, apple, cranberries, and pistachios.
Pour cashew mixture over barley mixture, and toss gently to combine.
Press into an 11 x 7-inch glass baking dish coated with cooking spray.
Sprinkle the top with chia seeds, pressing down lightly to stick them to the mixture.
Bake at 350° for 10 minutes, then brush honey over if you like. Cool, slice, and enjoy!