Masala Vada (Vadai)

Ingredients:

1 cup chana dal or also known Bengal gram
1 tablespoons rice flour
1 cup potatoes boiled peeled and mashed
1 teaspoon salt
1-1/2 teaspoons fennel seeds crushed
1 teaspoon mango powder
1/2 teaspoon black pepper crushed
1/8 teaspoon asafetida
1 tablespoon ginger paste
2 tablespoons finely chopped green chilies
1/4 cup cilantro finely chopped