Ingredients

1 package (1/4 ounce) active dry yeast1/4 cup warm water (110° to 115°)3/4 cup warm whole milk (110° to 115°)1/4 cup sugar1/4 cup shortening1 large egg1 teaspoon salt3-1/2 to 3-3/4 cups all-purpose flourMEATBALLS:1 can (5 ounces) evaporated milk2 large eggs, lightly beaten1 cup quick-cooking oats1 cup crushed saltines1/2 cup chopped onion1/2 cup chopped celery2 teaspoons salt2 teaspoons chili powder1/2 teaspoon garlic powder1/2 teaspoon pepper3 pounds ground beefFILLING:1 can (15 ounces) crushed tomatoes1/2 cup chopped onion1/3 cup grated Parmesan cheese1-1/2 teaspoons dried basil1-1/2 teaspoons dried oregano1 teaspoon minced fresh parsley1 teaspoon salt1-1/2 cups shredded part-skim mozzarella cheese

Preparation

In a large bowl, dissolve yeast in warm water. Add the milk, sugar, shortening, egg, salt and 2 cups flour. Beat until smooth. Stir in enough remaining flour to form a soft dough.

Turn onto a floured surface; knead until smooth and elastic, about 6-8 minutes. Place in a greased bowl, turning once to grease the top. Cover and let rise in a warm place until doubled, 1 to 1-1/2 hours.

In a large bowl, combine the milk, eggs, oats, saltines, onion, celery and seasonings. Crumble beef over mixture and mix well. Shape into 1-1/2-in. balls. In a large skillet over medium heat, cook meatballs in batches until no longer pink.

Meanwhile, place tomatoes and onion in a small saucepan. Bring to a boil. Reduce heat; simmer, uncovered, for 10 minutes or until slightly thickened. Stir in the Parmesan cheese, herbs and salt.

Punch dough down. Divide into three portions. Roll two portions into 11-in. circles; line the bottoms and press partially up the sides of two greased 9-in. springform pans. Roll third portion into a 12x10-in. rectangle; cut into twelve 10x1-in. strips.

Place meatballs in prepared crusts; top with tomato mixture and mozzarella cheese. Make lattice crusts with strips of dough; trim and seal edges. Cover and let rise for 30 minutes.

Preheat oven to 350°. Bake 30-35 minutes or until golden brown. Cut into wedges.