Place a large skillet over medium-high heat, add 2 tablespoons EVOO.
Open up the butterflied shrimp and season them with salt, freshly ground black pepper and a drizzle of EVOO. Place two sage leaves into the slice along the back where the shrimp has been de-veined and butterflied, then wrap each shrimp from head to tail with a slice of pancetta.
Transfer the pancetta-wrapped shrimp to the hot skillet and cook until browned and cooked through, about 2-3 minutes per side.
While the shrimp are cooking, make the panzanella salad: Combine the croutons, tomatoes, shallot, red pepper and basil in a large bowl. Toss the ingredients together with the red wine vinegar, 3 tablespoons EVOO, salt and freshly ground black pepper.