2 to 3 ounces of fresh ginger root
3 tablespoons of lemon juice
3⁄4 cup of sugar
4 quarts of water
1/8 tsp Yeast- bread yeast will work, ale yeast is better
Chop up the ginger root. Simmer ginger, juice, and sugar in 1 quart of water for 45 minutes. Remove from heat and strain. Mix brew with remaining 3 quarts of water. Let it all cool to lukewarm. In a small jar, stir in 1/8 teaspoon of yeast in with 1⁄4 warm water (not hot!.) Let sit 15 minutes then add the yeast solution to your brew. Mix then let sit for 10 minutes. Bottle it up!
Make sure you use clean bottles. Put 2 tablespoons of bleach in a gallon of water. Clean out bottles inside and out, rinse and air dry. To recycle plastic bottles: Pour soda in and twist the caps on tight. Squeeze the bottles and notice how they give. Every few hours, squeeze them and see how they are giving. They will get harder to squeeze. When they no longer give any more, put them in the fridge (1-2 days depending on warmth). If you use glass bottles, put them in the fridge after a day. I have seen many warnings on exploding bottles, both plastic and glass, using this method. I am not sure if it is a common problem or not but do be careful when bottling. Recipe makes 8, 16 ounce bottles.
Here is another variation of this type of soda.