Step 1

Tear up the bread and put it into a small bowl. Pour over the milk and eave to soak while you measure out everything else.

Step 2

Put the walnuts, garlic and grated parmesan into a small blender or food processor. Squeeze out the excess milk from the bread and add it along with a little salt and pepper. Blend them all together until well combined and smooth.

Step 3

Add the olive oil to the blender/food processor and pulse until smooth. Set aside until pasta is cooked. When your pasta is ready, don't discard all the pasta cooking water - keep some so you can add a little of the pasta water to thin down the sauce and help it become nice and creamy.