Here is a great pesto recipe that I use in my house and my 4 and 8 year old love.
1 cup fresh basil (or fresh/frozen see post)
1 cup fresh spinach
1/4 cup walnuts (I used a bit more even)
2 cloves garlic
1/2 parmesan cheese
1/2 cup olive oil drizzled in as you blend
*Blend in food processor and mix in your cooked pasta!! YUM