Heat oil, add chopped onion with ginger garlic paste, green chilies, mince, salt and crushed pepper, fry for 5 mins, add ½ cup water, cover and cook till mince tender then add chopped tomato cubes, ketchup, keep aside.
Method For Tortillas:
In a bowl mix together flour 2 cups, salt 1 tsp, baking powder 1 tsp, oil 1 tsp, mix and knead with warm water into a medium dough, divide into 8-10 balls, roll each ball into a 7 inch round on a floured surface, cook over medium heat on a tawa till done.
Method For Sauce:
Heat oil, add garlic and onion, fry for 1 min, add capsicum, salt, chili powder, coriander powder, cumin powder, tomato paste, sweet chili sauce, oregano leaves, and siracha sauce, add ½ cup water, and cook till sauce thick.
To Serve And Assemble:
Spoon mince on tortillas, roll tightly, put some sauce in an oven proof dish, place tortillas on sauce, pour remaining sauce on top of tortillas, sprinkle with cheddar cheese, drizzle sour cream, cover with foil, bake for 10 mins on 10 d till cheese melts.