We like the Delacata Squash. It tastes a little like sweet potato. I tried saving seeds on year from it but ended up with many different shapes and kinds of squash. Also kale is excellent antioxidant. Try the black cherry tomato. They are dark purple and have a different taste. About the size of a golf ball.
I order all my seeds from Rohrer Seeds in Smoketown, PA outside Lancaster. Usually order on line and pick up when I'm in the area to save the shipping. Just looked in the catalog and they have the Black Cherry tomatoe seeds listed. www.rohrerseeds.com