Prepare Hibiscus Iced Tea: Bring the water to a simmer (about 190°F / 88°C), then remove from the heat. Steep the tea bags (or loose tea) in the water for 10 minutes. After steeping, refrigerate the tea to cool.
Prepare Sandwich Ingredients: While the tea is cooling, prepare the sandwich ingredients. Optionally, toast the bread if desired.
Assemble Sandwich: Spread mayo on each slice of bread. Layer with lettuce, tomato, ham, and Swiss cheese. Top with the second slice of bread. Cut the sandwich in half.
Serve: Pour the chilled hibiscus tea over ice. Serve the sandwich with cheddar chips and pickle spears alongside the iced tea.