Broil or bake the baguette slices till toasted (I broiled them on one side only for 2 min)

In a food processor with the metal blade, puree peas, ricotta, scallion and parmesan with the remaining oil, 1/2 tsp salt, an d1/4 tsp pepper, scraping down th sides of the bowl occasionally until the Parmesan is brokendown and the mixture is nearly smooth.

Spread the pea mixture on the crostini and top with a sprinkle of Parmesan