Preheat the oven to 350°F. Line a 8” round cake pan with parchment paper and lightly spray with cooking spray.
In a small bowl, combine mango and lemon juice.
Combine brown sugar and butter and sprinkle evenly in the cake pan. Arrange the mango slices and sprinkle the nuts. Set aside.
Whisk flour, baking powder, salt and elaichi in a bowl.
In a medium bowl, whisk butter and sugar until light and fluffy. Beat in egg until incorporated.
Add half of the flour mixture and whisk until incorporated, next add half of the milk and mix well. Repeat with remaining flour & milk.
Pour the batter evenly over the prepared mangoes.
Bake for 30-35 minutes or until a toothpick inserted in the center comes out clean.
Cool for 5 minutes, before inverting onto a plate.