Aunt Andy made this on my most recent trip to New Hampshire/Maine. I'm afraid to mess up the consistency but perhaps I'll give it a go.

1/4 c. lemon juice
1 clove garlic, minced
1/2 tsp salt
1 egg and 1 yolk

Throw the above in a food processor, blend, and slowly drizzle 1 c. olive oil in. She stressed that the oil had to be slowly drizzled in or it would be ruined. She also said it would keep for at least a month in the fridge. Great to drizzle over asparagus or any other vege.