For taco shells
In a bowl add whole wheat flour, salt, baking soda and mix it well now to it add corn paste along with oil and mix very well. Now add warm water gradually to make a smooth but medium dough not too hard nor too runny. Knead it for 6-7 minutes and keep it aside to rest for 30 minutes. After that make balls of it and roll it out just like a normal chapati and cut it with the big size cookie cutter or any ring so every tortilla should be of same size.

Now on a griddle cook these tortillas just as we cook roti or chapati or flat bread. Now the main part once done with all the tortillas fold it in half and put it on the cooling rack upside down and bake it in a preheated oven for 15-20 minutes on 180°C or grill it in the microwave for 5-7 minutes or simply cook it for some extra time on griddle and fold it in half and keep it in a glass or mug cup to give the taco shell shape. Once done arrange it on the plates to cool down.

For filling
In a pan add 3 tbsp oil once get heated add the onions saute it until translucent then add salt mix it and add all the veggies toss it very well. Cook it on a high flame for 5 minutes then add rest of the spices toss it and lower the flame. Cook it for 5-7 more minutes and your filling is done. Feel free to use any veggies and spices which suits your taste buds. Make sure not to over cook the veggies we need a bit of crunchy side of veggies not soggy.