Prepare the Vegetables: Remove the tops from the tomatoes and peppers, and hollow out the interiors, creating a shell. Save the tomato pulp.
Prepare the Filling: Mix rice, finely chopped onion, minced garlic, fresh parsley, mint, olive oil, salt, and pepper. Mix well in a bowl.
Stuff the Vegetables: Stuff each tomato and pepper with the rice mixture, leaving space at the top for the rice to expand.
Prepare the Tomato Sauce: Blend the saved tomato pulp with tomato puree. Season with salt and pepper.
Arrange in Baking Dish: Place the stuffed vegetables in a baking dish. Pour the tomato sauce over them and add vegetable broth to the dish.
Bake: Place aluminum foil over the baking dish and preheat the oven to 375°F (roughly 190°C). Bake for 45-50 minutes or until the vegetables reach a tender consistency.
Serve: Serve the Yemista warm, drizzled with olive oil. Optionally, garnish with additional fresh herbs.