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.
Giangi's Kitchen provides nutritional information, but these figures should be considered estimates, as a registered dietician does not calculate them.