I finally figured out what was growing in one of the sections of my garden. It is rapini. I forgot what I planted where. I'm glad I didn't pull it up when it first started sprouting. At first I thought it might be weeds, but I wasn't sure.
I found a farm that has a web page about rapini. Apparently rapini is used in Italian and Asian cooking. This is perfect for me since we mostly cook Italian, Thai and Indian-style food around my house.
I picked a bunch of it that was showing flower buds and I plan to have it for dinner tonight with some pasta. Here's hoping it is an edible meal.