Season the chicken and cornstarch with salt and pepper. Dredge the chicken in the cornstarch, coating completely. Fry the chicken until golden brown, about 2 to 3 minutes. Drain on paper towels. Season with salt and pepper. In a large saute pan, heat the oil. When the oil is hot, add the cashews. Season with salt and pepper. Pan-fry until golden, about 4 to 5 minutes. Add the peppers and beans. Season with salt and pepper. Saute for 2 minutes. Remove from the heat. Toss the chicken and cashew mixture together. Mound in the center of a large platter and serve.