Yes, you can definitely use frozen mango in your mango chutney recipe. Frozen mango can be a convenient option, especially when fresh mangoes are out of season or not readily available. Simply thaw the frozen mangoes before using them in your recipe, and be sure to adjust the cooking time slightly as frozen mangoes may release more moisture during the cooking process. Overall, using frozen mango can still result in a delicious and flavorful mango chutne