1. In a skillet, heat 1 tbsp oil over medium beat, sauté the onion, garlic and Pancetta until pancetta is slightly crispy.
2. Add the spinach and rosemary and toss well to combine, cook, tossing until spinach is just wilted.
3. Remove from heat and let cool, mix in Parmesan and pine nut.
4. Preheat the oven to 375 oF.
5. Run your fingers between the skin of the chicken and the meat to create a pocket.
6. Stuff the pancetta mixture evenly under the skin.
7. Brush lightly with oil and season to taste with salt and pepper.
8. Bake until chicken is cooked through and juices run clear when pierced, 20 to 30 minutes.