The Loaded Potato Pizza

Name: The Loaded Potato Pizza
Ingredients: 15 medium red potatoes; 1 (14.5-ounce) can chicken broth; 6 large cloves garlic; 4 tablespoons butter or margarine; 3/4 cup of heavy whipping cream; 2 teaspoons salt; 1 teaspoon black pepper; Basic Pizza Dough, recipe follows; 2 cups garlic mashed potatoes; 3 ounces sauteed onions; 3 small tomatoes, sliced thin; 4 ounces shredded provolone; 4 ounces shredded fontina; 4 ounces bacon, cooked and crumbled; 1 teaspoon cracked pepper; 1 teaspoon onion salt; 3 cups bread flour; 1 teaspoon salt; 1 package active dry yeast; 2 tablespoons vegetable oil; 1 cup warm water