My personal favorite of our garden by far is the zucchini! We like to pick it when it's still pretty small, and the flavor is just amazing, especially on the grill!
We've got cucumbers planted on three different trellises in the yard, and they really booming into production now. We have two different varieties - Dasher II, which is a delicious slicing cucumber & National Pickling Cucumbers, which are smaller and better suited for making pickles.
We're looking forward to even more production from our garden.