In a large mixing bowl, add whole wheat flour. Add grated raw mango, mango puree, chopped coriander leaves, ginger-garlic paste, and finely chopped green chili.
Now add all the basic spices like turmeric, red chili powder, coriander-cumin powder, hing, salt, sugar, sesame seeds, and ajwain.
Add oil and combine all the ingredients with your hand until well incorporated.
Make a dough by using water little by little as required, ensuring it is smooth, soft, and pliable. Cover with a kitchen towel or cloth and set aside for 10-15 minutes.
Make small lemon-sized balls from the prepared dough and keep them covered under the kitchen towel.
Take one ball, dust and coat it with flour, and roll it into a thin Thepla. Repeat the same method to roll out the remaining dough balls.
Heat the griddle/tawa. Once hot enough, place the rolled Thepla over it. Turn it upside down after 10-15 seconds once you see small bubbles on the top surface.
Wait for another 10 seconds to cook the bottom part. You will see small brown spots on the back of the Thepla.
Take ½ tsp oil and spread it all over the Thepla on the griddle. Cook/roast, pressing with a spatula until slightly crisp and golden brown on both sides.
Remove the cooked Thepla from the griddle and store it in a roti dabba or covered container. Apply ghee to keep the Thepla soft for a longer time.
Use the same method to make more Theplas from the remaining dough balls.
Serve fresh with dahi, bateta nu shaak, pickle, or just enjoy with a hot cup of tea.