Beat eggs, milk, and oil until foamy with a whisk. Add flour and salt, whisking until smooth. Pour batter over Mozzarella cheese, spreading evenly. Sprinkle with Parmesan cheese. Bake at 400F for 30 minutes or until the top is puffed and golden brown. Cut into squares; when serving, flip each piece over with the crust side down. Serves 6.
NOTE: In additional to (or in place of) the pepperoni, add chopped green pepper, sliced mushrooms, etc., -- whatever you like on your pizza!
Turn dough onto lightly floured surface; knead until smooth and elastic, about 10 minutes, working in more flour (about 1 cup) while kneading. Cut dough in half; cover and let rest 10 minutes. Grease large cookie sheet. Shape each piece of dough into a 5-inch round loaf. Place loaves on opposite ends of cookie sheet. cover; let rise in warm place until doubled, about 45 minutes.
Preheat oven to 400F. Cut 3 parallel slashes in each loaf; brush loaves with water. Bake 25 to 30 minutes until loaves sound hollow when lightly tapped. Remove from cookie sheet and cool on wire rack. Makes 2 loaves.