Happy 13th Birthday, Rosie!
Add into a food processor in this order:
2 packed cups of basil leaves
1 cup fresh Parmesian cheese
1/4 cup Romano cheese
4 cloves of garlic
1 cup olive oil
salt and pepper to taste (I just add that when we are ready to use it)
Whir it up in the food processor.
Pour into freezer safe containers.
Freeze (refrgerate or use right away - 1 batch works great on 1 pound of pasta)