| | FOR THE DOUGH |
| | A 1/4-ounce package; (2 1/2 teaspoons) |
| | ; active dry yeast |
| 1 | tb | Sugar |
| 3 | c | All-purpose flour |
| 1 | ts | Salt |
| 1/4 | c | Olive oil |
| | FOR THE FILLING |
| 2 | | Garlic cloves; minced |
| 2 | c | Thinly sliced onion |
| 1/4 | ts | Dried hot red pepper flakes; or to taste |
| 2 | tb | Olive oil |
| 2 | c | Thinly sliced fennel bulb |
| 1 | | Green bell pepper; sliced thin |
| 1 | | Red bell pepper; sliced thin |
| 4 | | Plum tomatoes; chopped |
| 1/3 | c | Minced fresh parsley leaves |
| 1 | c | Freshly grated Parmesan; (about 3 ounces) |
| 1 | c | Coarsely grated mozzarella; (about 1/4 pound) |
| 1 | c | Coarsely grated provolone; (about 1/4 pound) |
| 1 | c | Crumbled Gorgonzola; (about 1/4 pound) |
