Heat oil in a skillet over medium heat. Add tomatoes, basil, oregano, artichoke hearts and red peppers. Cook until just hot, then remove from heat. transfer to a large bowl and toss together with mozzarella cubes.
Preheat oven to 350 degrees F (175 degrees C). Lay out the pounded breasts and spoon filling onto the center, leaving an inch on each side. Adjust filling as you roll so as not to over stuff. Place them seam side down into a 2 quart baking dish. cover with marinara sauce. Place lid onto dish or cover with aluminum foil.
Bake for 35 to 45 minutes in the preheated oven, or until chicken is cooked through. You'll love it!
