Put your instant pot on sear/saute and set on high heat. Add 1/2 cup of vegetable oil.
To the pot, add 2.5 cups of yogurt, 3/4 tablespoon ginger paste, 3 minced garlic cloves, and the full packet of Achar Ghost Shan masala. Mix together and allow to simmer while you prepare your beef.
Cut your beef into 1.5-inch cubes, add it to the pot and mix. Allow it to sear for about 5 minutes, stirring periodically.
Put the lid on your instant pot, set it to pressure cook, and cook it on high for 40 minutes with a 10-minute natural release.
Slice your 6 roma tomatoes into 8ths and pulse them in a food processor or blender until slightly chunky. Do not blend all the way.
Transfer your tomato mix into a mesh colander over the sink and shake it gently from side to side until most of the juice has left. Set aside.
Prepare your 3 tablespoons of squeezed lemon juice and your jalapeño slices.
Once your instant pot has completed the 10 minute natural release, remove the lid and set it on sear/saute on high heat. You will now stir in the lemon juice, jalapeño slices, and tomato mix.
Keep your pot on high heat and stir periodically for about 20 minutes or until the desired consistency is reached. You want to allow a lot of the liquid to cook out so that it is not runny.Serve and enjoy!
Notes
Serves best with basmati rice cooked with a sprinkle of oil, salt, and cumin seeds.