The tea bags will need to be removed immediately after the cooking time has been completed as if they are left in too long, the tea may become bitter.
Try adding a pinch of bicarbonate of soda to help reduce any bitter flavour, if needed. Add it just after removing the tea bags from the hot tea.
You can use a calorie-free sweetener instead of sugar, though you will need to adjust the amount to your desired sweetness as some sweeteners measure the same as sugar while others require less.
Nutrition
Sodium: 0.1mg | Calcium: 0.03mg
Nutritional information is an estimate and provided as a courtesy. The values may vary according to the ingredients and tools that are used. Please use your preferred nutritional calculator for more detailed information.