Heat Up Pressure Cooker: Heat up your pressure cooker (Instant Pot: press Sauté button, then press Adjust button to go to Sauté More function). Make sure your pot is as hot as it can be when you place the goat shoulder in the pot (Instant Pot: wait until the indicator says HOT). If you are using frozen goat shoulder meat, be careful.
Brown Goat Shoulder: Add 1 tablespoon of olive oil in the pot. Ensure to coat the oil over whole bottom of the pot. Add goat shoulder in the pot. Add in 2 pinches of kosher salt and black pepper. Then, brown the goat shoulder on all sides for a total of roughly 5 minutes. Remove and set aside.
Sauté Shallot, Onion, Ginger, Garlic: Reduce the heat to medium (Instant pot: press Cancel button, then press Sauté button). Add 1 tablespoon of olive oil in the pot, then add in sliced onion, minced ginger and shallot, then stir for roughly a minute. Add the minced garlic and stir for roughly 30 seconds until fragrant.
Mix Curry and Deglaze: Add in 3 tablespoons of curry powder and ¼ teaspoon of Indian chili pepper, then stir for roughly 1 to 2 minutes until fragrant. Add ¼ cup (63ml) of water or chicken stock and fully deglaze the pot. Add in remaining 1 cup of water (250ml) or unsalted chicken stock.
Pressure Cook Curry Goat: Place all the goat shoulder with all the meat juice in the pot. Add 1/2 cup (125 ml) of tomato paste on top of the goat shoulder. Do NOT stir. Add in the quartered potatoes. Close lid and pressure cook at High Pressure for 35 to 40 minutes (See tips section above). Turn off the heat and fully Natural Release (roughly 15 minutes).
Garnish and Serve: Open the lid carefully, break up the potatoes to thicken the curry sauce. Stir in one tablespoon of chopped cilantro. Taste the seasoning and add in more salt to greatly enhance the flavors (Tip: we added 3 pinches of sea salt, please adjust accordingly). Serve immediately!