Low carb, low fat, and low cholesterol, perfect if you are watching your weight.
Heat oven to 350°F.
Heat oil in a frying pan and brown chicken, turning occasionally - from 3 minutes for chicken breast strips or chicken goujons to about 5 minutes for chicken thighs or drumsticks. Transfer chicken to a casserole dish.
Add onion and celery to the pan and cook for 4-5 minutes, stirring, until slightly soft. Add garlic and mushrooms to the pan and cook, stirring, for a further 2-3 minutes,
Add vegetables from the pan to the casserole dish with the chicken, and then add green beans, canned tomatoes, and chicken stock. Season with salt and pepper, cover, and bake for 35 minutes, or until chicken is tender.
Remove from oven, check seasoning, and serve.
If not on a diet, serve with your choice of mashed potato, steamed potato slices, rice, or pasta.
Substitute 2 pieces chicken breast with 4 chicken thighs, or 4 chicken drumsticks; 1/2 green beans with 1/2 cup frozen broad beans, thawed and skin removed.
Tip: If you don't have an oven casserole dish with a lid, use an oven dish and cover with foil.