Combine water, sugar, ginger, and lemon peel strips in a large saucepan. Bring to boiling; reduce heat and simmer, uncovered, for 10 minutes. Remove ginger and lemon strips with a slotted spoon and discard them.
Place tea bags in a teapot; immediately add simmering water mixture. Cover; let steep according to tea package directions. Remove tea bags; discard. Serve beverage immediately. If desired, garnish with lemon slices. Makes 6 servings.