Pesto is amazing. In the time it takes to boil your noodles, you can have a gourmet meal.
Put the following in the blender in the order listed:
2 cups basil leaves (or for a change of pace, try parsley)
2 cloves garlic
1/3 cup pine nuts or walnuts
1/2 cup grated Parmesan cheese
2/3 cups olive oil
Blend for a few moments at medium speed until it looks the consistency that you like it. You may have to use the pusher to get all the goodies down to the blender blades.
Pour it over hot pasta.
This is how parsley pesto looks over tortellini.