Slow Cooker

1. Add potatoes and green beans to the slow cooker. Stir to mix.
2. Season chicken with salt & pepper. Add chicken on top of potatoes & green beans.
3. Season all the food with the Italian seasoning.
4. Pour the diced tomatoes on top of the chicken.
5. Cook HIGH 2-3 hours or LOW 4-6.

Instant Pot

1. Season chicken with salt & pepper.
2. Turn the pressure cooker to saute. Once hot, add the oil and chicken skin-side  down and sear, few minutes until browned. If you are using boneless, skinless chicken skip this step and add the chicken directly to the pressure cooker. 
3. Pour in broth and add potatoes on top of chicken. Sprinkle Italian seasoning on top of chicken & potatoes. Add diced tomatoes on top of the potatoes and do not stir. Close lid and seal valve. Set high pressure and cook 10 minutes. Quick release pressure.
4. Add vegetables and cook another 3 minutes on high pressure. Quick release pressure when done. Make sure internal temperature for the chicken is 165° Fahrenheit).
5. Season with more salt, pepper, or Italian seasoning if needed.