Brown the ground turkey on medium heat in large sauté pan and season with salt and pepper.
Use a wooden spoon to break the meat up into small pieces.
Add the chopped onions, garlic, pepper, tomato and cilantro and continue cooking on a low heat.
Add alcaparrado (or olives and capers) and about 2 tbsp of the brine (this adds great flavor) cumin, oregano, bay leaves, and more salt if needed.
Add tomato sauce and 1/4 cup of water and mix well.
Reduce heat to low and simmer covered about 15 minutes.
Preheat to oven to 350°F.
Lightly spray a 9 x 9 baking dish with oil.
Heat a large non-stick sauté pan over medium heat.
When hot spray with oil to lightly coat the bottom.
Cook plantains for 2-3 minutes on each side or until golden; set aside.
Assemble by layering the plantains, then the cooked turkey picadillo, then about 1/4 cup of cheese and repeat.
You want to finish with a layer of plantains.
Beat the egg and egg whites with 2 tbsp of milk and pour over the pastelón to help bind everything, letting it sit for a minute or two to soak in.
Top off with the remaining cheese.
Cover tight with foil and bake in the oven 30 to 35 minutes, or until completely heated through.