Saute ground beef and drain, unless using very lean beef. Add spaghetti sauce and bring to a simmer for 10 minutes.
In a large bowl, mix milk, spices, beaten eggs and half the mozzarella cheese together. Toss spaghetti with this mixture. Divide into two 9 x 13 inch pans (may be frozen at this point if keeping one for an extra) and bake for 15 minutes @ 350 degrees.
Remove from oven. Cover with the meat sauce. Place pepperoni slices over the meat sauce then top with remaining cheese. Bake about 30 minutes @ 350 degrees until bubbling and cheese is lightly browned.