Heat oven to 350°F. Spray cookie sheet and large skillet with nonstick cooking spray. In sprayed skillet, combine ground beef and onion; cook until beef is thoroughly cooked, stirring frequently. Drain.
Add tomato sauce, flour, basil, oregano and fennel seed; mix well. Reduce heat to medium-low; simmer 5 minutes. Remove from heat.
Meanwhile, remove dough from can; place on lightly floured surface. Cut loaf in half lengthwise. Roll each half to form 16x4-inch rectangle. Place 1 dough rectangle on sprayed cookie sheet, being careful not to change shape.
Stir 1/2 cup of the cheese into ground beef mixture. Spoon and spread mixture over dough rectangle on cookie sheet. Sprinkle with remaining 1/2 cup cheese. Top with remaining dough rectangle.
Bake at 350°F. for 25 to 30 minutes or until golden brown. Cut into slices.