A very healthy and easy to make vegetable sandwich  which is colorful and tasty too. With its colored attractive layers even the hard core non vegetarians will never say a no if you serve it to them. A really good one for kids who hesitate to have vegetables as you can attract them with the colorful healthy layers.
I made five layers for this rainbow sandwich using five different veggies but used same filling for all layers. As this is a rainbow sandwich I made red, orange, yellow , purple and green layers and choose veggies matching these colors like beetroot and tomato for red, carrot for orange, yellow capsicum for yellow, onions for purple and cucumber for green. I wanted to try different fillings for each layer but as I didn't get enough time to prepare five different fillings , I thought to stick to one filling and change only the veggies.Yes that's the easiest part, make same filling for all layers and just change the vegetables that's it , your rainbow sandwich is ready.
This is a wonderful snack for a kids party or special occasion. You can even make it as a chicken and veg sandwich by adding cooked and shredded chicken to the layers as kids will love it more when a non veg touch is given to any dish. Also this sandwich is really heavy as it containes five layers filled up with lots of veggies , so it will be good if you serve them in small portions .You can even prepare the veggie filling ahead and keep them in the refrigerator . So just take them out ,spread on ...