Hard-boiled eggs are a popular and nutritious snack made by cooking eggs in their shells until both the white and yolk are firm. To prepare them, you simply place the eggs in a pot of water, bring it to a boil, and then let them simmer for about 9 to 12 minutes. Once cooked, they are cooled in cold water to make peeling easier. These eggs are versatile and can be enjoyed on their own, sliced in salads, or used in dishes like deviled eggs. They are a great source of protein and can be stored in the refrigerator for several days, making them a convenient option for quick meals or snacks.