Raw Banana Varutha Erissery: Vazhakkai Roasted Coconut Curry

Name: Raw Banana Varutha Erissery: Vazhakkai Roasted Coconut Curry
Ingredients: 2 cups raw green banana sliced (2 plantains/ banana/ vazhakkai ); ½ teaspoon salt (or to taste); ¼ teaspoon turmeric powder; 1 cup water (or enough water to just cover the top of the plantain slices); 1 cup fresh grated coconut; 1 tablespoon coconut oil; ¾ cup roasted coconut (From the 1 cup roasted as above); 1 teaspoon Cumin seeds (jeera seeds); 1 green chili; ¼ cup water (or minimum required for grinding to a paste); 2 teaspoons coconut oil; 1 teaspoon Mustard seeds; 1 dry red chili; a few curry leaves (about 10); ¼ cup roasted coconut (from the 1 cup roasted as above)