1. Heat the olive oil to medium-low in a very large saute' pan. Stir in the pureed garlic and prosciutto only long enough to infuse the flavor; do NOT cook. Stir in the basil, oregano, and pepper only to infuse. Remove from heat, cover, and keep warm to let flavors mingle.
2. When ready to serve, return the saute' pan with the sauce to medium-low heat and reheat. Remove from heat and stir in the hot, drained pasta, the spinach, and the toasted pine nuts. Stir to coat the pasta and wilt the spinach leaves.
3. Divide the mixture into 4 serving bowls and top generously with the cheese.