You have the possible process right, but a few Congressmen recommending a special counsel is not at all the same as ‘Congress’ doing it. Congress would due it as a resolution approved by majority vote.
NOTE: Be aware of Richard Nixon’s ‘Saturday Night Massacre’.
Yes, i see your point about being passed by Congress. Still that should be a given since the Repubs control both houses.
As for Nixon’s Saturday Night Massacre, yes, I have not forgotten that. I do however wonder if we are in a new era and if Trump is bound by the same rules of etiquette that Nixon was given that Trump is the alleged injured party in this case, not the alleged perp.