"Create a diabetic-friendly tea cake recipe that is sugar-free, jaggery-free, date-free, and contains no artificial sweeteners. Use naturally low-sugar ingredients and rely on the sweetness of ingredients like unsweetened applesauce, ripe banana only if appropriate, or other naturally sweet options without added sweeteners. Make it suitable as a tea cake, moist and lightly spiced, and include metric measurements only. Provide a clear ingredient list, step-by-step method, baking temperature and time, and brief notes on storage and optional flavor variations while keeping it diabetic-friendly."