4 to 5 lbs chopped Bartlett pears, do not peel or core them
1 star anise
2 Tbsp chopped fresh ginger
2 cups water
1 cup lemon juice
2-3 cups sugar
1/2 teaspoon ground cardamom
1/2 teaspoon ground nutmeg
1 teaspoon lemon zest
Put chopped pears, star anise, and ginger into a large pot. Add 2 cups of water and 1 cup of lemon juice.
Bring to a boil, reduce to a simmer, cover, and cook until the pears are completely soft, anywhere from 25 to 40 minutes. Remove from heat.
Fish out and discard the star anise from the pear mixture. Ladle the pear mixture into a chinoise or food mill and force the mixture through to a large bowl below. Discard remaining solids .
Measure the resulting purée, and pour into a large , wide, thick-bottomed pan. For every cup of pear purée, add 1/3 to 1/2 cup of sugar . Stir to dissolve the sugar. Add the cardamom, nutmeg, and lemon zest. Taste and adjust seasonings if necessary.
Cook on medium heat, stirring often to prevent the purée from sticking to the bottom of the pan and burning. Cook until the mixture is quite thick, and a small bit placed on a chilled plate is not runny. This can take anywhere from 45 minutes to 2 hours, depending on the batch.
While the mixture is cooking, sterilize the jars for canning. To sterilized the jars, either 1) run them through the short cycle of your dishwasher, 2) rinse them and place them in a 225 degrees F oven for 10 minutes, or 3) place them on top of a steaming rack in a large pot of water which you bring to a boil for 10 minutes.
When the pear butter is ready, pour into hot, sterilized jars and seal, allowing for 1/4-inch head space between the pear butter and the rims of the jars. If you plan to store the pear butter outside of a refrigerator, follow proper canning procedures. Before applying the lids, sterilize them by placing them in a bowl and pouring boiling water over them. Wipe the rims of the jars clean before applying lids. Use a hot water bath* for 10 minutes to ensure a good seal. *Place on a steaming rack in a large pot of boiling water that covers the jars by at least an inch.