In a small bowl, stir together the warm water and sugar until the sugar dissolves. Stir in the yeast and allow this to sit for 6-8 minutes (it should activate and will look foamy). In a large bowl, stir together the flour and salt. Stir in the yeast mixture and 1 tablespoon melted butter until a loose dough ball forms. Turn out onto a lightly floured counter and knead for 4-6 minutes, until the dough begins to become elastic. Place in a lighlty oiled bowl, cover and allow to rise for an hour. During this time, make your lavender sugar if using.