Peel, core, and dice the apples. Add to a 6-quart Dutch oven.
Pour sugar, cinnamon, and cardamom over the apples. Stir lightly and allow to rest for 30 minutes until the apples release their juices.
Add lemon zest, lemon juice, and vanilla, stirring to combine. Bring mixture to a boil, then cook over medium heat, stirring occasionally, for approximately 20 minutes, or until the syrup thickens. Remember that it will thicken further as it cools!
While the preserves is cooking, sterile the jars and lids by boiling them in a large pot of water.
Use an immersion blender to emulsify to the desired consistency. Fill sterilized jars with the preserves, leaving a half-inch headspace.
Place jars in a water bath for 15 minutes. Remove the jars, and allow to cool on the counter. Store in a dark, cool place, or share them with your family and friends!