Ingredients: 
- Lemons 
- water
- sugar
- salt


Preparation:
1) General guideline is, by volume:
-- 5 parts water
-- 1 part lemon juice
-- 1 part granulated sugar
-- Optional: pinch of salt to taste
2) Halve lemons, juice. Strain if you don't want pulp
3) Stir until smooth. Serve over ice