Mix the flour, salt, and black pepper in a shallow dish. Dredge the chicken breasts in the flour mixture, shaking off any excess.
Heat the olive oil in a large skillet over medium-high heat. Add the chicken breasts and cook until browned on both sides, about 3 minutes per side.
Remove the chicken from the skillet and place it in a baking dish.
Add the onion, bell pepper, and garlic to the skillet and cook until softened, about 5 minutes.
Add the diced tomatoes, red wine, chicken broth, basil, oregano, thyme, rosemary, and bay leaf to the skillet. Stir to combine.
Pour the tomato mixture over the chicken in the baking dish.
Cover the baking dish with foil and bake for 30 minutes.
Remove the foil and bake for an additional 15 minutes, or until the chicken is cooked through and the sauce is bubbly.
Serve the Holy Matrimony Chicken hot, garnished with fresh herbs if desired.