Ingredients

• 12 eggs
• 1 onion, sliced into rings
• 1 cup distilled white vinegar
• 1 cup water
• 1/4 cup white sugar
• 10 cloves garlic, peeled

Directions

1. Place eggs in a medium saucepan and cover with cold water. Bring water to a boil and immediately remove from heat. Cover and let eggs stand in hot water for 10 to 12 minutes. Remove from hot water, cool and peel.
2. Place the eggs in a 1 quart jar with the onion rings.
3. In a medium saucepan, bring to a boil the vinegar, water, sugar and garlic. Remove from heat and allow to cool approximately 15 minutes.
4. Pour the vinegar mixture over the eggs and cover. Refrigerate 1 week before serving.

Try these alterations from the comments:

• Use red wine vinegar
• 1 T of dill weed
• Chopped fresh Jalapenos
• Peppercorns
• USE LESS SUGAR
• pinch of kosher salt

http://allrecipes.com/Recipe/Garlic-Pickled-Eggs/Detail.aspx