6 lbs Alaska Pollock fillets, thawed if necessary
3/4 lb Chorizo or Mexican-style sausage, crumbled
2 cups onions, chopped
1 cup canned or fresh green chilies, diced
3 cups Monterey Jack cheese, shredded
24 flour tortillas, 9-inch diameter
Guacamole, sour cream or salsa, if desired