Step #2 Cook spaghetti according to package directions, rinse, drain well & place this In a large-ish mixing bowl.
Step #3 Add 1 c each of both cheeses & all remaining ingredients.
Step #4 Toss together well.
Step #5 (If you have children who like to cook, have them toss this together with their hands--it really helps to get the spaghetti noodles mixed in evenly, & the kids think it's fun.
Step #6 )
Turn all ingredients into a 13- x 9- x 2-inch lightly greased baking dish & top this with remaining cheese & a few pepperoni slices.
Step #7 Bake for 35 mins or until cheese is golden & bubbly.