Something that my mother-in-law loves to cook with is beets. She boils them, roasts them and pickles them. She'll add them to a soup or a salad. She can do just about anything with a beet.
My favourite is a beet salad. Especially in the summer. It's so easy to make and I usually prepare this salad in advance and refrigerate until ready to serve.
The only downfall to working with beets is that they stain your hands and clothes, so I recommend wearing an apron and wearing gloves while handling this root vegetable. I also recommend eating organic beets since they grow underground.