Add the hot water, flour, salt, yeast, and Pizza Dough Flavor. Mix to combine, then knead until smooth and slightly sticky, about 7 minutes at medium speed using a stand mixer with dough hook. Place the kneaded dough in a lightly greased container, and allow it to rise until it's just about doubled in bulk. This might take 2 to 4 hours; it might take more. A lot depends on how recently you'd fed your starter; a starter that's been fed rather recently will react to the addition of flour and water more quickly than one that's been neglected for awhile. For a faster rise, place the dough somewhere warm (or increase the yeast). To slow it down, put it somewhere cool.