Peel and devein the shrimp, reserving shells and heads. Simmer the reserved shells and heads in 2 cups (500 ml) water until the water turns orange. Strain into a bowl and press the heads and shells to extract the juice. Reserve the shrimp stock and discard the heads and shells.
Simmer the peeled shrimp in 2 cups (500 ml) water, until shrimps turn orange, 2-3 mi