I adapted this from a recipe I found at "Cooking with Amy". It is super easy and super cheap, even with the Parmesan.
2 cloves garlic minced
1 Tbsp Olive Oil
1 Cup frozen peas
1 hand full of fresh basil chopped roughly
8oz pasta, any kind really will do
1 Cup reserved pasta water
Cook the pasta per the directions on the box, drain reserving 1 cup of pasta water
Heat the olive oil over medium heat in a large skillet
Add the garlic to the pan
When you start to smell the garlic add the peas
Add a little water and cover the skillet and cook till the peas are heated through
Remove the lid and allow the water to cook off
Transfer the peas to a blender or a bowl if using a stick blender.
Add the basil and blend the peas till smooth, add pasta water as necessary to get the consistency you want
Toss the pesto and pasta together, sprinkle the parm over and serve.