Prepare the dosa
In a large bowl, beat eggs along with onions, coriander leaves, green chillies, salt and pepper, keep it aside.Heat a cast-iron pan. Now take a ladle full of the batter. Pour the dosa batter and gently spread the batter starting from the center and moving outwards. Cook the dosa on a low to medium flame. Spread small ladle full of beaten egg mixture evenly on the dosa. Allow it to cook for a few minutes. Then sprinkle ¼ to ½ tsp oil on the edges and center. Cook till the base is nicely golden and crisp.