In a mixing bowl stir together soup, onion, nutmeg and black pepper.
In another bowl, place half of the soup mixture, drained spinach, crab and 1 cup of the monterey jack cheese; set aside. Wrap the tortillas in paper towels; microwave on 100% power for 30-60 seconds. Place 1/3 cup mixture on each tortilla; roll up. Place seam side down
in a greased 12 x 7 1/2 dish. Stir milk into the reserved soup mixture, pour over enchiladas. Cook, covered, on high for 12-14 minutes. Sprinkle with the remaining cheese. Let stand for 10 minutes. Can add a dash of hot pepper sauce to soup mix if desired.