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I have cooked a number of pizzas without using the BGE grille. Specifically, I have set the plate setter in the upright position (i.e. with the legs pointing downward), and the pizza stone being placed directly upon the plate setter. The pizza have turned out well.
Recently, I saw a BGE catalogue where they show cooking pizza by placing the pizza stone upon the grille, and the grille is sitting upon the legs of the plate setter which is in the inverted position (i.e. legs up).
Which method have you used, and how do the results of the two compare?