This is a great meal if you have skinny kids - lots of good fats! In my food processor, I combined:
1T melted butter
3/4c toasted walnuts
1/4c parmesan cheese
1tsp dried thyme
salt and pepper
I pulsed to combine then drizzled in 1/4c olive oil. I put this in a bowl and mixed with a couple T of whole milk. The recipe called for heavy cream, but I didn't have any. I boiled about 1/3lb rotini, added it to the walnut mixture and stirred in about 1/4c of the pasta water. I also mixed in some peas, but that's optional!