Pizza dough, recipe below
1/2 cup purchased marinara sauce
1 cup coarsely grated Fontina cheese
1/2 cup finely grated Parmesan cheese
1/3 cup coarsely grated mozzarella cheese
2 ounces crimini (baby bella) mushrooms, thinly sliced
2 ounces thinly sliced pancetta (Italian bacon), coarsely chopped
Preheat oven to 475°F. Line 2 large baking sheets with parchment. Divide dough in half. Roll out 1 half on lightly floured surface to 131/2x81/2-inch rectangle. Transfer to 1 baking sheet. Repeat with second half. Spread 1/4 cup marinara sauce over each pizza, leaving 1/2-inch border. Sprinkle cheeses over, then mushrooms and pancetta. Sprinkle with salt and generous amount of pepper.
Bake pizzas until brown on bottom and cheese is melted, about 15 minutes. Cut each pizza crosswise into rectangles.
3/4 cup warm water (105°F to 115°F)
1 envelope active dry yeast
2 cups (or more) all purpose flour
1 teaspoon sugar
3/4 teaspoon salt
3 tablespoons olive oil
Pour 3/4 cup warm water into small bowl; stir in yeast. Let stand until yeast dissolves, about 5 minutes.
Brush large bowl lightly with olive oil. Mix 2 cups flour, sugar, and salt in processor. Add yeast mixture and 3 tablespoons oil; process until dough forms a sticky ball. Transfer to lightly floured surface. KNEAD dough until smooth, adding more flour by tablespoonfuls if dough is very sticky, about 1 minute. Transfer to prepared bowl; turn dough in bowl to coat with oil. Cover bowl with plastic wrap and let dough rise in warm draft-free area until doubled in volume, about 1 hour. PUNCH down dough. DO AHEAD Can be made 1 day ahead. Store in airtight container in refrigerator. ROLL out dough according to recipe instructions. (Start in center of dough, working outward toward edges but not rolling over them.)