I mostly eat pork, not beef but it must be tricky with ground meat, I can keep the fat in very well if I roast a bigger slab… I probably would mix it with egg and whatnot and make meatballs, that should trap the fat (and it needs some to fry in anyway. or make a little sauce if one doesn’t fry them). My meatballs are pork, of course, the leanest meat I have and a lot of fatty skin and the fat stays in but maybe it’s partly because it’s together with the skin?
Whatever, if it’s just fried alone, it should release the most fat, stuck together should help.
There must be lots of dishes where the fat is rendered out but is eaten together with the meat… If it’s too fatty, you need leaner meat anyway.
No idea if it was any helpful.
I keep forgetting making photos…