I really don't have a favorite veggie...I love so many of them! But my top favorites are..
cucumbers...I love them in a salad or alone on a sandwich. Lightly toasted bread spread with a thin layer of mayo, salt and pepper. sooo good!
tiny zuchinni/summer squash...lightly sauted in olive oil and celery salt. I cook it till it's soft with just a tiny bit of crunch.
Tomatoes picked fresh and still warm from the summer sun
And....fresh, crisp, ice cold radishes...with a touch of salt....