To sweeten the deal, offer to write for free.
But in 1639-1640 civil discords in England stood in the way of a strong foreign policy, and the adroit Aarssens was able so " to sweeten the bitterness of the pill " as to bring King Charles not merely to " overlook the scandal of the Downs," but to consent to the marriage of the princess had a quasi-independence of its own.
That in my answer to his first letter I refused his correspondence, told him I had laid philosophy aside, sent him only the experiment of projectiles (rather shortly hinted than carefully described), in compliment to sweeten my answer, expected to hear no further from him; could scarce persuade myself to answer his second letter; did not answer his third, was upon other things; thought no further of philosophical matters than his letters put me upon it, and therefore may be allowed not to have had my thoughts of that kind about me so well at that time.
Commercial nettle tea has a very strong taste which may take some getting used to, or you can sweeten it with a little honey to make it more palatable.
These include Brussels sprouts, which sweeten after frosty nights, as well as broccoli, cabbage, cauliflower and kale.