Cut the bell pepper into chunks and slice the red onion into rings. In a skillet with hot olive oil, add the peppers, onion, and parsley. Season with salt and pepper, and cook for 10 minutes.

Add the ground beef and slice the pickles into rings. Cook for 4 minutes.

In a large, hot skillet, warm the piadina and add the filling to one half. Fold it over and cook on both sides. Serve immediately.