One thing at a time, or in meaty terms:
In un sol tegame non c'รจ posto per cucinare insieme lesso e arrosto (In a single pan, there isn't room to cook both roast and boiled meat)
Taking your time, doing it right, one thing at a time, you can be sure that you'll never be accused of being
molto fuoco e poco arrosto
(literally a lot of flame and little roast, or a lot of show and little substance).