Cook pancetta (or bacon) in pan until crisp. Remove from pan and set aside and keep warm.
Brush both sides of naan bread with a little olive oil, then place on baking sheet. If you want a crispier pizza, place the naan on a pizza screen. Top each piece of naan with a couple tomatoes and slices of mozzarella cheese. Bake about 10 minutes, until cheese is melted.
Top each pizza with a handful of arugula and sprinkle pancetta on top.