Do you know what tests they did? If it were me, I would have wanted a CBC, chem panel and TSH.
I don't know what your grocery store situation is. I have one in town, and the selection of produce is usually not great. I go get whatever they have that looks like quality produce, then figure out how to cook it. Allrecipes.com lets you search by ingredient. Learning a few basic techniques for cooking vegetables also makes them taste so much better than I remember as a kid, LOL.
You can also get creative at sneaking veggies into your diet. Omelettes (or in my case, egg muffins, because you can bake a big batch and refrigerate for a week and heat and eat as needed) are great for that. Cowboy caviar has veggies and beans. One of my favorite snacks is half an avocado with a little Dorothy Lynch dressing. Cottage cheese with tomatoes and bell peppers. Stuffed mac and cheese is great, too.
As far as getting in shape, I would recommend alternating weight lifting with walking. Resistance training is so important for bone health, especially for women. I would also recommend several short stretching sessions every day. Yoga is good too, particularly for core strength, which really helps when you ride.
Learning never stops