First, add some salt and black pepper to the chicken. Use a big pan and heat olive oil. Put the chicken in and cook it until it turns a yummy golden color. When it's done, put it on a plate.
In the same pan, let's make it smell really good! cook the onion and garlic until they look a bit see-through. Add the colorful bell peppers and stir them around. Pour in crushed tomatoes and red wine, and let everything mix up and smell delicious.
Now, Sprinkle in some dried oregano, thyme, and rosemary. You can add a bit of salt and black pepper, just how you like it. Let it cook a bit so all the yummy flavors mix together.
Carefully put the cooked chicken back into the pan. Make sure it's covered in the tasty sauce. Let everything cook on low heat. This way, the chicken gets really soft and full of flavor.