In a large mixing bowl, combine oats flour, wheat flour, ajwain, cumin powder, and salt.
Gradually add warm water and knead into a soft dough.
Cover and let the dough rest for 5 minutes. This helps oats absorb moisture and improves texture.
Divide dough into 4 equal portions. Dust lightly with flour and roll into medium-sized rotis.
Heat a tawa over medium heat. Cook each roti until bubbles appear, then flip and cook both sides until golden brown spots develop.
Serve hot with dal, sabzi, yogurt, or pickle.