pasta with peas

• 3/4 stick butter
• 1 onion
• 1 pound shell pasta
• 4 cups frozen peas
• 6 basil leaves
• Parmesan cheese
• Salt and pepper

PROCEDURE

1. Bring a large pot of water to a boil. Melt the butter in a large pan over medium heat. Toss in the onion and cook until slightly wilted.
2. 
   
   Plunge the shells in the boiling water. Cook according to package instructions. With five minutes left, add the peas to the onions, and add a tablespoon of the cooking liquid.
3. 
   
   When the pasta is done, toss with the butter and onions over medium high heat.
4. Sprinkle in the chopped basil, shred some cheese, and season with salt and pepper.