Prepare the Onions: Peel the onions and cut off both ends. Cut a slit down one side, without cutting through completely and boil the onions for 15-20 minutes, until the layers can easily separate.

Make the Filling: While the onions are boiling, prepare the meat filling. In a large bowl, combine the ground beef, rinsed rice, garlic, tomato paste, pomegranate molasses, lemon zest, salt, paprika, allspice, black pepper, parsley, and mint. Mix well to combine.

Preheat the Oven: Preheat your oven to 400°F (200°C).

Assemble the Stuffed Onions: Once the onions are done, drain them and allow them to cool for at least 10 minutes. Carefully separate the layers of the onions. Place 1 heaping tablespoon of the meat mixture into each onion layer, then wrap the layer around the filling. Place each stuffed onion seam side down, tightly packed, into a baking dish.

Make the Tomato Sauce: In a separate bowl, whisk together the water, tomato paste, pomegranate molasses, and salt until smooth. Pour the sauce evenly over the stuffed onions.

Bake the Onions: Cover the dish and bake for 45 minutes, until the sauce has slightly reduced and the onions are tender. Remove the lid and bake uncovered for an additional 10-15 minutes to thicken the sauce.

Serve: Remove the dish from the oven and allow it to cool slightly. Garnish with chopped parsley and serve warm.