1.Make pizza dough. Combine flour, yeast, sugar and salt in medium bowl; make a well in the centre. Stir in oil and enough of the water to mix to a soft dough. Knead dough on floured surface about 10 minutes or until smooth and elastic. Place dough in large oiled bowl, cover; stand in a warm place about 1 hour or until dough doubles in size. Turn dough onto floured surface; knead until smooth.
2.Preheat oven to 240°C/475°F. Oil two oven or pizza trays; place in heated oven.
3.Divide dough in half; roll each half on floured surface into a 30cm (12-inch) round. Place on trays.
4.Spread pizza bases with sauce; top with cheeses and speck.
5.Bake pizzas about 15 minutes or until bases are browned and crisp.
6.Meanwhile, combine vinegar, the water, juice and sugar in small saucepan; stir over heat, without boiling, until sugar dissolves. Bring to the boil. Reduce heat; simmer, uncovered, about 10 minutes or until syrup thickens slightly.
7.Serve pizzas topped with rocket and drizzled with syrup.