Preheat the oven to 375°.
In a large skillet over medium heat add 1 tablespoon olive oil and sauté` the shallots until soft, 2 minutes. Add the spinach and cook until just wilted, about 2 to 3 minutes. Transfer to a colander.
When cool enough to handle, squeeze out all the moisture from the spinach and transfer to a medium bowl. Stir in the bread crumbs and cheese. Season with salt and pepper.
Separate the skin from the chicken meat, insuring that the end are not separate but forming a pocket, and fill the pocket with the gorgonzola spinach mixture.
Sprinkle generously with salt and pepper and sear on a large ovenproof skillet over medium high heat. Start with skin down for 3 to 4 minutes and then turn over.
Place the skillet in the hot oven and cook for another 20 to 30 minutes.