Potato and Prosciutto Pizza

Prepare crust: In bowl of electric mixer (fitted with the dough hook, if available), combine flours, yeast, salt and sugar.  Gradually mix in water and oil.  Knead on med. speed until dough is smooth and elastic, about 10 min. (If dough hook is not available, knead dough on lightly floured surface until smooth and elastic, about 4 to 6 min.) 

Form dough into a ball; place in lightly oiled bowl, turning to coat top.  Cover with towel or plastic wrap; let rise in warm, draft-free place until doubled in volume, about 1 hr. 

Lightly dust 12-in. pizza pan with semolina flour. Punch down dough. On lightly floured surface, roll dough out to 13- to 14-in. circle; fit onto prepared pan.  Let rise in warm, draft-free place for 20 min. 

Preheat oven to 425 F. Brush top of dough with 2 tsp. oil.  Arrange sliced garlic evenly over top.  Using a mandoline, food processor or sharp knife, cut potatoes into very thin slices, about 1/8-in. thick.  Scatter potato and prosciutto over dough.  Drizzle with cream and remaining 2 tsp. oil; sprinkle with thyme.  Season generously with pepper and lightly with salt, as desired. 

Bake in center of oven for 30 to 35 min. or until crust edge is golden and cream is bubbly.  Let stand 5 min.  To serve, cut into wedges.