Preheat oven to 350F. Mix flour with stock and heat until slightly thickened. Add the whipping cream (or half and half), green onion, salt and pepper. Bring to boil. Stir in sour cream until well mixed. Dip each tortilla in cream sauce, then arrange chicken and strip of pimento down center of each tortilla. Roll and greased baking dish (or spray with food release) seam side down.
Pour remaining cream sauce over all and bake for 30 minutes. Remove from oven and sprinkle grated cheese over all and return to oven until cheese is melted. Arrange coarsely chopped lettuce around edges of dish. Serve with green chili sauce or salsa Cruda or Pico de Gallo.
