Leche de Monja

One or more whole Egg with shells
Lime juice or lemon-lime juice (to cover eggs)
Sugar to taste
Pisco to taste

Place whole eggs, in shell, (organic would be preferable) in a jar. Cover with lemon/lime juice. Seal the jar and refrigerate. Leave the eggs to marinate for 2-3 weeks. The shells should become soft. Place the eggs and juice in a blender and blend until smooth. Strain to remove egg membranes. Add sugar and pisco to taste.