Pea soup, my sister's high school graduation and too many caipirinhas

I wish I could say that I made this soup for a noble reason, but the truth is that I made it for lunch because of a massive hangover. :S

It all started the night before: we’d all gone to my sister’s high school graduation prom and had a lot of fun there (I shed a few tears during the ceremony, too, I’ll admit it). Then my brother told me that I “had to try” the caipirinhas that were being