Gujarati Dry Mung Bean Curry

Name: Gujarati Dry Mung Bean Curry
Ingredients: 1 1/2 cups mung beans; 1 small pinch baking powder; 1 tablespoon sunflower oil; 1 teaspoon mustard seeds; 2 teaspoons cumin seeds; 1/4 teaspoon asafoetida (optional); 6 curry leaves; 1 tablespoon garlic, minced; 2 mediums hot chillies, minced; 1 medium tomato, chopped; 1/2 teaspoon turmeric; 1 tablespoon lemon juice or to taste; 1 teaspoon cinnamon powder; Salt to taste; Sugar to taste; 1/4 cup chopped coriander