Prepare a piece of aluminum foil just slightly larger than the piece of salmon you will be grilling. Spray foil with cooking spray.
Place salmon skin side down on the aluminum foil on a preheated grill. Drizzle olive oil on the salmon and sprinkle with salt and pepper.
Zest some lemon over your salmon, then cut lemon in half and squeeze some juice over the the salmon. Layer pancetta pieces down the middle.
With lid down cook salmon over medium heat for 10 minutes per inch of thickness or until fish flakes easily with a fork (I go by feel but do not overcook).
Remove salmon from grill and serve immediately.
Notes
Leftover salmon can be used in salads, sandwiches, pasta dishes or even salmon loaf.