Dry roast cumin seeds carom seeds and peppercorn together. Cool it and grind into a powder. Set aside

In a large bowl, mix together gram flour, whole wheat flour, onion, chilli, turmeric, dry mango powder, yogurt, coriander leaves, salt, oil, and the roasted powder

Gradually add water and knead into the dough

Cover with a moist cloth and rest the dough for 15-20 minutes

Take a lemon sized dough and dust it with flour. Roll into 6-7 inch disc

Heat a griddle or tawa. Carefully place the rolled roti on to it and let it cook for a minute on medium flame

Flip over to cook the other side. Apply 1 teaspoon oil

Flip again and gently press using a spatula or wide spoon. Apply some oil and flip again till done

Repeat for the rest of the dough

Serve hot with butter and yogurt