Place hard boiled eggs and sliced onions in a heat-safe lidded jar or glass container. Pour the mustard pickling mixture over eggs and onions. Place in refrigerator for 5 to 7 days.
Combine all ingredients (except eggs) in a medium saucepan and bring to a boil. Simmer for 5 minutes and remove from heat to slightly cool. (about 5 minutes) Place hard boiled eggs and sliced onions in a heat-safe lidded jar or glass container. Pour the mustard pickling mixture over eggs and onions. Place in refrigerator for 5 to 7 days.
These pickled eggs are marinated in a cider vinegar that is spiced with mustard and turmeric powder. The longer they set, the better they get. Place the hard-cooked eggs into a 1 quart jar. In a saucepan, stir together the mustard, cornstarch, sugar, turmeric, and salt.
In a saucepan, stir together the mustard, cornstarch, sugar, turmeric, and salt. Pour in just enough of the cider vinegar to make a paste, then gradually stir in the rest. Bring the mixture to a boil, stirring frequently. Pour into the jars with the eggs.