1.Heat oil in a frying pan on medium-high. Add onion, pancetta and garlic; cook 2-3 minutes, stirring constantly, until softened.
2.Stir in rice; cook 1 minute, until well coated. Add 1/2 cup chicken stock; cook 1 minute, until absorbed.
3.Stir in 1 cup of stock and reduce heat to medium; cook until liquid is absorbed.
4.Add remaining stock, 1/2 cup at a time; cook, stirring often, until liquid is absorbed. (This should take about 20 minutes in total, until rice is tender). Add peas last 5 minutes of cooking.
5.Remove pan from heat; stir in grated parmesan. Serve with shaved parmesan and a grinding of pepper.