For the Filling:
Heat the oil in a large skillet. Add onion and saute until translucent, then add meat, stirring to break up pieces.
Add rice, dill weed, El Greco, pine nuts, water and tomato paste and cook over medium heat until water is absorbed, about 10 minutes. Season to taste with salt and pepper.
To Stuff The Grape Leaves:
Cover the bottom of a Dutch oven with a layer of grape leaves.
Stuff remaining leaves by placing leaf (shiny side down) on the palm of your hand, with the base of leaf the toward your wrist and tip pointing to your middle finger.
Put a spoonful of meat mixture in center. Fold the base of the leaf over the filling, then fold sides of leaf over like an envelope, tucking the edges in snugly. Arrange, tip side down to prevent unrolling, in the Dutch oven.
To Cook The Stuffed Grape Leaves:
Add broth to Dutch oven within 1 inch of top layer of stuffed grape leaves. Use any left over leaves to cover top layer. Place a heat-proof plate upside down over the top layer of dolmas, and press firmly.
Cover and cook over medium heat until rice is tender, about 30 minutes. Sprinkle with lemon juice and cook 5 minutes longer.
Let cool to room temperature, or chill thoroughly. Serve garnished with lemon slices and a little Greek yogurt for dipping.