Prepare the green tomatoes by washing and chopping them into small pieces.
Combine the chopped green tomatoes and sugar in a large pot.
Add the lemon juice, ground cinnamon, ground cloves, ground ginger, and salt to the pot.
Stir the mixture until all ingredients are well combined.
Place the pot on medium heat and bring the mixture to a boil, stirring occasionally.
Reduce the heat to low and let it simmer for about 1 hour until thickened, stirring frequently.
Use a ladle to pour the hot jam into sterilized jars, leaving a 1/4 inch headspace at the top.
Seal the jars with lids and let them cool at room temperature.
Allow the jam to rest for 24 hours before using to enhance the flavors.
Notes
Ensure your jars and lids are properly sterilized to prevent contamination. Use ripe yet firm green tomatoes to achieve the best consistency. Adjust the spices to your taste preference but be cautious as the flavors will intensify after resting.