Dish of beef roast, carved up with good source of nutrients, is no longer on the menu (10)
I believe the answer is:
stroganoff
'dish of beef' is the definition.
(beef Stroganoff)
'roast carved up with good source of nutrients is no longer on the menu' is the wordplay.
I cannot really understand how this works, but
'good' could be 'g' (abbreviation) and 'g' is present in the answer.
an anagram of 'roast' is 'stroa' which is located in the left over letters.
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is found in the answer.
This explanation may well be incorrect...
(Other definitions for stroganoff that I've seen before include "meat dish" , "Beef dish with mushrooms in sour cream" .)