Dinner -red meat. Large steak, burgers (no buns) Roast beef, etc. As much as he wants. Salt and pepper and spices ok, but no condiments like gravy, BBQ sauce, steak sauce, ketchup or relishes (they are full of HFCS and sugar.) Feel free to use butter with everything.
I concede in advance that I'm addressing a mere issue of culinary comfort while enduring a serious--potentially life-threatening--ailment, but:
After decades of my ranting against high proportions of presumably unneeded sugar and
de facto sugar (i.e., high-fructose corn syrup) in
BBQ sauce, I finally discovered an objective reason for it: The adhesive characteristics of sugars are needed during cooking, to keep the sauce coating
on the meat being cooked. Otherwise, explained the ad-free & scientifically oriented
Cook's Illustrated, the sauce would quickly drip off, ruining its effectiveness.
It seems to me that with some free time, you could use a
blender to make
simple condiments that are appropriate to the diet and diners' tastes. You have the advantage that whatever you make doesn't need to be stable enough to ship to distant places in an unrefrigerated truck or rail car, only stable enough to avoid spoiling while sitting in your
refrigerator.
At this point, I warn readers that I'm reaching beyond my layman's medical knowledge. Couldn't you avoid sugars, HFCS, &c. by rejecting the common-but-detrimental catsup base in favor of a
fresh tomato or canned diced tomato
base (altho' canned products risk excessive levels of sodium)? Then blend in onions, garlic, cilantro (if you're free from the soapy-taste gene)? Far be it from me to overlook hot peppers, but not everyone welcomes the pungent heat. For readers not under some medical decree banishing sodium (e.g., by a cardiologist), salt (as sodium chloride), could be added to taste. Stranger ingredients might be worthwhile; consider that Worchester sauce, which has the disadvantage for some readers of being quite sodium-intensive, contains anchovies (salted beyond natural growth in the sea).