Chop chicken into bite-sized pieces. Season with salt and pepper.
Finely chop the cashews in a food processor. Mix with the butter.
Start the pasta. Break up the pasta, otherwise it doesn’t mix well with the other ingredients. Add the green beans 6 minutes before the pasta has finished cooking.
While the pasta is cooking, warm the olive oil in a skillet over medium heat. Add the chicken and cook 3 to 4 minutes until it is no longer pink inside.
When the pasta is done, drain and add the chicken and cashew butter.