At a running time of 51 minutes, and with perhaps only half the numbers required for a full adaptation of the 2007 animated Oscar-winner, this “Ratatouille” is a mere appetizer. But with a winning Tituss Burgess as the human embodiment of Remy, the Parisian rodent who can stir up a mean beef bourguignon, it is a promising first course. And the harbinger of a future property on the school circuit or maybe even in some professional incarnation. (Another leading indicator: The Actors Fund announced that the production surpassed $1 million in ticket sales on its premiere night.) – Washington Post