Center the oven rack, and preheat the oven to 450°F (230°C).
Scatter all of the root vegetables (except the garlic) onto the baking tray. Sprinkle them with the olive oil and the salt and pepper, and then toss them about with your hands until all are slick with oil. Put the baking sheet in the preheated oven, and give the veggies a toss every ten minutes until tender and beginning to caramelize – 25-30 minutes.
Put the pizza crust on a pizza peel or a rimless baking tray. Spoon the ricotta cheese onto the center of the crust, and then spread it out (I use an offset spatula here) to within 1 inch of the edge. Sprinkle the minced garlic over the cheese. Distribute the roasted veggies evenly over the crust, dust with the Italian seasoning, and top with the Asiago cheese.
Lower the oven temperature to 425°F (220°C). Slide the pizza directly onto the oven rack, and bake until the cheese melts and the edge of the crust begins to color – about 10 minutes. Slide the pizza back onto the pizza peel or rimless baking tray, and then transfer to a wooden board. Slice and serve at once.