Mix together the beef, lamb, rice, olive oil, salt, mint, parsley, pepper, oregano and onions. This is the filling. Next, rinse the grape leaves and separate in a colander. Place 2 to 3 grape leaves stem-side up on a work station; they should overlap each other. Place desired amount of filling in the center and roll, folding in the sides. Repeat with the remaining grape leaves and filling. Arrange tightly together in a stockpot. Once the stockpot is full, cut the lemons in half and put on top. Cover with beef stock and simmer until the rice is soft, 30 to 45 minutes.
This recipe was provided by a chef, restaurant or culinary professional and may have been scaled down from a bulk recipe. The Food Network Kitchens chefs have not tested this recipe, in the proportions indicated, and therefore, we cannot make any representation as to the results.