01 - Wash the lemon thoroughly under running water.
02 - Roll the lemon on a countertop using your palm with gentle pressure to loosen the juice.
03 - Cut the lemon crosswise into two halves.
04 - Hold one half over a bowl or glass, cut side up to catch seeds, and squeeze firmly by hand or with a citrus juicer.
05 - Squeeze the other half in the same manner to extract remaining juice.
06 - Strain the collected juice through a fine mesh sieve to remove pulp and seeds if desired.