Very nicely described ultrasound
report. There are two things why you should follow your doctor's advice. One is the size of the nodule in your right lobe of thyroid. It is more than 4 cm. It is based on evidences that such a big size better be treated by taking out the thyroid to avoid chances of malignancy in the thyroid. Second one is the 'hypoechoic areas' in the nodule which means that part of the gland is functionally minimally and this kind of hypo-functioning area has always high rates of getting positive to be malignant.
Before that you can also go for something called 'FNAC' that is fine needle aspiration cytology where they see what kind of cells are there in the nodule as the ultrasound doesn't tell clearly. But as I said you are having a clearcut condition to undergo thyroidectomy
, post surgically also they will see what kind of cells would those be and decide on further treatment. Beans are fine to eat. Hope this helps. Do revert back for further queries. Good luck.