How to Make It
In a large bowl, whisk the flour together with the yeast, salt and sugar. Pour in the water and stir well with a wooden spoon to form a dough. Scrape the dough out onto a lightly floured work surface and knead for a few minutes until smooth. Transfer the pizza dough to a lightly oiled large bowl. Cover with plastic wrap or a damp towel and let stand in a warm place until the pizza dough has doubled in bulk, about 1 1/2 hours.
Set a pizza stone on the bottom or on the bottom shelf of the oven and preheat to 500° for at least 30 minutes.
Bring a medium saucepan of salted water to a boil. Blanch the ramps until they are bright green but still al dente, about 1 minute. Drain, pat dry and cut into 1-inch lengths.
Punch down the pizza dough and transfer it to a lightly floured work surface. Roll out the dough to a 12-inch round, about 1/8 inch thick. Transfer the dough to a lightly floured pizza peel or an inverted baking sheet. Brush the dough with olive oil and sprinkle on the grated mozzarella in an even layer. Scatter the blanched ramps over the mozzarella and season lightly with salt and pepper. Top the pizza with the Parmigiano-Reggiano cheese.
Slide the pizza from the peel onto the hot stone. Bake for about 8 minutes, until the cheese has melted and the pizza crust is browned and crisp on the bottom. Transfer the pizza to a work surface, cut into wedges and serve right away.
For the cheese, Mantuano recommends the Crescenza by Paula Lambert's Mozzarella Company in Dallas (mozzco.com). You can also use water-packed fresh mozzarella or fiore di latte; drain the cheese well before grating it.