To make pear puree, I use the the star grater. (You know, it's one of those that pokes out, start shaped and very sharp.) It creates super fine flakes and that's why I love using it for a quick puree of apples, pears or other fruit. Just watch your hands, it's really sharp!
For weak simple syrup: combine 3 oz warm water with 3 tsp sugar and stir until sugar is melted.
Combine amaretto, vodka, lemon juice, pear puree and simple syrup in a shaker with a couple of ice cubes. Shake well.
Pour into a martini glass through a fine strainer to catch most of the pulp.
*Note: If you like pulp, you don't need to pour this martini through a strainer.