In a large bowl, combine the first seven ingredients. Cover and refrigerate overnight.
Let filling stand at room temperature for 30 minutes. Meanwhile, in a large saucepan, bring 6 cups water to a boil. Add snow peas; cover and boil for 1-2 minutes. Drain and immediately place peas in ice water. Drain and pat dry.
Gently split peas open; pipe about 1 teaspoonful of filling into each pod.