Cut lemons in half and squeeze out all the juice into a glass jar.
Slice or chop the lemon up and place those pieces into the jar along with salt, sugar, and carom seeds.
Cover the jar with an air-tight lid and give it a good shake to mix well.
Store the jar in the pantry and continue to give the jar a shake every now and then.
Continue to add lemon, lemon juice, and spices as needed.