Preheat oven to 350 degrees F.
Add olive oil to a 9 x 13″ or equivalent casserole pan. Sprinkle in the Italian seasoning, smoked paprika, red pepper flakes if using, salt and garlic.
Add the peppers, tomatoes, onion, and chicken breast and toss together so items are well coated. Add in the butter beans and gently mix.
Bake for a total of 40 minutes, 30 minutes covered and 30 minutes uncovered. Check chicken for doneness and give a few more minutes if needed. When finished, sprinkle with red wine vinegar, parsley, and olives.
Find it online: https://frugalhausfrau.com/2023/08/30/easy-chicken-peppers-bake/