Indonesian tradisional food "Salted duck egg"

A salted duck egg is a Indonesian preserved food product made by soaking duck eggs in brine, or packing each egg in damp, salted charcoal. In Tradisional markets, these eggs are sometimes sold covered in a thick layer of salted charcoal paste. The eggs may also be sold with the salted paste removed, wrapped in plastic, and vacuum packed. From the salt curing process, the salted duck eggs have a briny aroma, a very liquid egg white and a firm-textured, round yolk that is bright orange-red in colour.
Salted duck eggs are normally boiled or steamed before being peeled and eaten as a condiment to congee or cooked with other foods as a flavouring. The egg white has a sharp, salty taste. The orange red yolk is rich, fatty, and less salty.
Despite its name, salted duck eggs can also be made from chicken eggs, though the taste and texture will be somewhat different, and the egg yolk will be less rich.
Salted eggs sold in the Indonesia undergo a similar curing process, with some variation in ingredients used. They are dyed red to distinguish them from fresh duck eggs.

Telur Asin Brebes (Salted Duck Egg from Brebes)

During my trip to Bandung, I saw a street vendor selling boiled salted duck eggs from Brebes.

Brebes is a small city in Central Java with population less than 2 millions people is very well known for producing salted duck eggs in Indonesia. The salted duck eggs from Brebes are the best. The way of making the salted duck egg is by packing each duck egg in damp salted charcoal and leave it for 7 to 10 days. Some vendors are selling their salted duck eggs unboiled with the salted charcoal paste still wrapping the eggs and some other vendors are selling the boiled and clean with a stamp on each egg.

The most wonderful part of the salted duck egg is the dark orange fatty yolk! Yes, I love it so much! Oh.. and I don't bother at all with the white egg part which is too salty and sharp for my tastebuds ;)

Production 

Pateros method

A popular method for processing salted eggs in the Indonesia is the Pateros method. The salted egg is prepared "Pateros style" by mixing clay (from ant hills or termite mounds), table salt and water in the ratio of 1:1:2 until the texture of the admixture becomes smooth and forms a thick texture similar to cake batter. The fresh eggs are individually dipped in the admixture, and packed in 150-egg batches in newspaper-lined 10x12x18 inch wooden boxes (often residual boxes of dried fish packing). The whole batch is then lightly wrapped in newspapers to slow down the dehydration process.
The eggs are then stored indoors at room temperature over the next 12 to 14 days to cure. This way the salt equilibrates in the batch by osmosis. Curing can last up to 18 days, but that results in very long-lasting red eggs that can have a 40-day shelf life, which is largely unnecessary, as the eggs are stocked and replenished biweekly.
After the two-week curing period, the eggs are hand-cleaned with water and a brush and prepared to be boiled in low heat for 30 minutes. Time is measured from the first moment the water boils and the immersion of the eggs. The 50-egg batch is then wrapped in fish nets for ease of removal from the cookware. The cookware must be large enough to accommodate the batch with a two-inch covering of water.
Chicken eggs may be processed the same way, although up to 10% of the batch can break during the process.

Cholesterol content

According to the Health Promotion Board of Singapore, one salted duck egg yolk weighing about 70 g contains 359 mg of cholesterol.^{[citation needed]} The recommended cholesterol intake for a healthy diet should be less than 300 mg a day.^{[citation needed]} A single salted egg yolk exceeds the recommended cholesterol intake, and if eaten regularly, there might be a greater risk of elevating blood cholesterol level. However, there has been recent controversy among health experts, some of whom have changed their position to de-emphasize the importance of dietary cholesterol on blood cholesterol levels, in light of the large degree of self-regulation of dietary and blood cholesterol played by the liver, and the notion that blood cholesterol is a good but imperfect indicator rather than a causative factor of cardiovascular issues.

Refferences:
http://en.wikipedia.org/wiki/Salted_duck_egg
http://selbyfood.blogspot.com/2009/11/telur-asin-brebes-salted-duck-egg-from.html