Boil a pot of water, while you prepare the Swiss chard leaves by washing thoroughly. Slice each leaf into 6 pieces (make sure to cut off the spine).
Use the Swiss chard spines and stems to line the bottom of a 6 or 8-quart Dutch oven to prevent overcooking. If you don’t have enough, you can use grape or cabbage leaves. Alternatively, steaks can be used to line the bottom of the pot.
Dip approximately 4 to 6 Swiss Chard leaf sections into boiling water for a few seconds. Drain the blanched leaves in a colander. Repeat until all the Swiss chard has been blanched.
In a large bowl, mix the filling ingredients (starting with the rice, and ending with the cayenne pepper).
Add oil, lemon juice, and tomato paste. Mix thoroughly until the tomato paste is evenly distributed.
Place approximately one tablespoon of filling into the center of Swiss chard leaves and roll into a tight cigar shape. Place in tight rows in the Dutch oven. Repeat until the entire stuffing mixture and Swiss chard are used up.
Cover the pot with the lid, and cook over medium heat for 10 to 15 minutes, or until juices are released.