Prepare the ingredients. Grind 2 cups of walnuts, slice figs, squeeze lemon for juice, and grind half a teaspoon of cardamom seeds.
Combine and heat. In a large saucepan, mix figs, ground walnuts, lemon juice, cardamom, and 1/2 cup of water. Heat over medium, stirring occasionally.
Soften figs. Simmer for 15 minutes until the figs are soft.
Add sugar. Stir in 1/2 cup of sugar until dissolved.
Boil. Increase heat, and boil for 10 minutes until thickened, stirring occasionally.
Transfer and cool. Remove from heat, transfer to sterilized jars, and allow to cool before refrigerating or freezing for up to 3 months. Enjoy your Fig and Walnut Jam!