Pizza is the quintessential cheap eats. A slice typically only costs a couple of bucks, and it's fast and portable. One slice, however, is often not enough, and you're left wanting more. At Pinocchio's in Harvard Square, however, one slice is filling, and two slices, for the low price of $3.95, makes a full meal. The Sicilian slices are hefty, especially if you snag a corner piece. The dough is crispy on the bottom......