1.   Are the carrots cooked enough?

2.   Cook the carrots until tender.

3.   Carrots can be cooked, but they are often eaten raw.

4.   After cooking the carrots until tender, stir in cream and whir everything in a blender, in a couple of batches, until smooth.

5.   Cook carrots in boiling water until tender.

6.   Otherwise, simply cook carrots and mash them to desired consistency.

7.   Purchase fresh watercress and cook more carrots to serve with the leftover roast.