Take dry chillies and cut the top open. Remove the seeds out of it. You can just invert it and roll between your hands, the seeds just fall off. Now take the chillies and add it to a sauce pan. Add 1 cup of water and bring it to boil. Simmer it for 5 mins.By this time the chillies must have plumped up. Drain chillies. Reserve the water, you need that for grinding. Take the chillies in a blender add the reserved water slowly and make them into a paste. Set aside till use.

Now heat oil in a sauce pan. Add in garlic and ginger. Fry it for couple of mins.Now add in the chilli paste and mix well. Now add in ketchup, soya sauce, salt, sugar and pepper. Mix well.Simmer this sauce for 5 to 8 mins.Now the sauce is done. Cool this and store in a clean air tight container refrigerated.

Heat oil in a pan till smoking hot, add in all veggies except sauce. Toss well for 2 to 3 mins. Now add in schezwan sauce and toss well. Set aside.

Heat a tawa, make dosa thinly, now dollop a tsp of butter and little schezwan sauce. Spread it evenly. Now top with veggies and cheese. Fold and serve.