I went to a Catholic school in the 1960’s when they served real food. The nuns would check your tray as you left and send you back to the table to finish anything you left (usually vegetables)
Some of the scariest moments of my life were walking past the nuns with my empty milk carton filled with peas.
My wife would disgree with you on the real food comment, she doesn’t consider fish sticks and tuna to be real food