Double the proportion of rice and lentils. Cook it without any tempering (not even salt). Once cooked, divide the mixture in half. Prepare the savory tadka and add it to one-half of the mixture along with salt. Ven Pongal is ready. Similarly, add the jaggery to the other half to make Sakkarai Pongal. This is what my mom would do during the Pongal festival.