Knead a dough with the atta, salt to taste and required quantity of water. Keep aside for 15 minutes.
Heat 1 tbsp. oil and shallow fry the sausages till light brown on all sides. Drain and keep aside.
Divide the dough into equal portions and roll out each portion into a chapatti. Heat a tawa / griddle and shallow fry the chapattis with a tsp. of oil for each chapatti, on both the sides.
Pour 1/3 of the beaten egg over one side of the chapatti and move in a circular motion so that it spreads all over.
Flip it over and cook for a minute till done. Keep aside. Fry the remaining of the chapattis is the same manner.
To assemble, spread a tbsp. of the mayonnaise on each of the chapattis. Place a sausage, followed by some chopped onion, bell peppers, a sprinkle of pepper powder and tomato sauce. Roll it over around a piece of foil and serve.