Cook lasagna according to package directions.
Remove from oven and arrange pepperoni slices over top of hot lasagna. Separate dough into breadsticks. Evenly place breadsticks lengthwise and crosswise over pepperoni, weaving to form a lattice crust. Trim any excess dough. Place lasagna on a cookie sheet. Bake at 325 degrees F for 25 to 35 minutes or until breadsticks are golden brown.
Sprinkle mozzarella cheese over the top and return to oven just until cheese has melted.