Heat oven to 450. Spray a 8" square baking dish w/ cooking spray. Cook pasta as directed, drain. In small bowl, combine bread crumbs, oil and paprika. Set aside.
Press spinach in a strainer to drain any excess liquid. Heat 1-1/2 cups milk in lg saucepan over medium heat until steaming. In bowl, whisk remaining milk w/ flour.
Add to milk in saucepan. Whisk until it thickens. Remove from heat. Stir in cheeses, nutmeg, salt and pepper. Add pasta to sauce. Spoon 1/2 the pasta mix into baking dish, top w/ the spinach and then remaining pasta mix. Top w/ bread crumbs. Bake 30 mins, or until bubbly.