In a mixing bowl, add potatoes, paneer, carrot, cheese, 1 tsp. chaat masala, lemon juice, salt and mix well. Divide the mixture into four equal parts and roll each part into a long roll of the size of chapaties. Keep aside. Warm the chapaties and place on a serving plate. Put one roll of potato & paneer mixture in the center of a chapati. Also add some capsicum and tomato strips, sprinkle chaat masala on the top and roll up the chapati. Repeat the same procedure with the other chapaties and serve hot.