Halve the slices of prosciutto. Pat cod dry with paper towels and season with salt and pepper. Wrap fish in prosciutto. Heat oil in large nonstick skillet until it ripples over medium-high heat. Cook fish 3 to 4 minutes on each side until prosciutto is crisp and fish is firm. Do not crowd the pan. Work in 2 batches, fish can be served at room temperature or kept warm under a loose foil tent. Serve with lemon wedges.