Bring a pot of water to boil. While water is heating up, peel your potatoes and chop into 1" cubes.
Boil the potatoes for about 5-10 minutes, or until they can be pierced with a fork (but not too mushy). Check often to ensure doneness.
When the potatoes are ready, drain and carefully add to your blender. You can let them cool first if possible. Then, add in all other ingredients and blend on high for AT LEAST 30-60 seconds. If you don't have a high-speed blender, blend for even longer to ensure creaminess.
Taste, and adjust seasonings if needed. I added a little more lemon juice and salt.
Then, cook your pasta of choice in salted water until al dente. When done, drain and toss with the sauce.
Add any toppings you like - I used chopped almonds, but breadcrumbs would also be delicious!
Enjoy!