Process corn in a blender until smooth, stopping to scrape down sides. Add half-and-half and next 3 ingredients; process until smooth. Pour mixture through a fine wire-mesh strainer into a bowl, discarding solids. Pour mixture into 8 (6-ounce) buttered custard cups or ramekins. Place cups in a 13- x 9-inch baking dish. Add hot water to dish to a depth of 1 inch.
Bake at 350° for 25 minutes or until set. Remove custards from water, and cool 5 minutes on a wire rack. Invert onto plates.
Prepare demi-glace sauce according to package directions.
Process parsley and oil in blender until smooth. Serve demi-glace sauce and parsley oil with corn flan.
Note: For demi-glace sauce mix we used Knorr brand.