In another large pot, heat the olive oil and 1 tbsp butter. Add the onion, celery, leeks, garlic and bay and saute for 5 minutes until translucent. Add the rice and stir continually for a few minutes until the rice has gone translucent. Pour in the wine and reduce while stirring, for another 5 minutes. Turn the heat down and slowly ladle in your herby pea stock, waiting until each ladleful is absorbed before adding the next. Keep stirring.