First, use a non-stick skillet, like a cast iron skillet. I suggest adding 1-2 tablespoons of olive oil to the pan to decrease the likelihood of sticking. Do not try to tilt the pan itself to attempt to spread the batter – use the back of a measuring cup or other metal spoon to gently spread the batter. I also use a non-stick spatula to flip the red lentil tortillas, but am gentle and start around the edges to gauge if any part of the tortilla center is trying to stick to the pan before making any large movements.
Note that you will need to keep the heat no hotter than the medium setting on your stove. Don’t force the tortillas if they are resisting flipping – allow them to cook a little longer.