spagoh,
i buy my beef frm cold storage. they have prepacked beef labelled 'stewing beef/cubes'. if buy frm wet market, u juz tell seller is for bb, most times they will gv knuckle,can ask them to minced it for u.
beef for stewing r tougher cuts, oso cheaper, cos the longer u stew, the softer it becms. tenderloins r exp, i think abt $20+/kg.
i nv try stir fry beef for stew b4..shd b ok,then dun have to cook for so long.
if u have time to spare, got slow cooker, then u juz dump evthg in and cook, takes abt 2hrs or mre.
u can use vege stock cos u wan let ur bb try beef taste rite? aw, after cooking u muz blend till puree, cos no way 8mo can chew beef. my boy is 11mo, smtimes let him try minced beef oso will gag..the meat is simply 2 chewy.
glad to share..