Gather and prepare all your ingredients. Finely chop the onion and celery, and mince the garlic. Peel, core, and cut the butternut squash into 1-inch cubes. If necessary, rinse the meat under cool water, drain, and pat dry.
Turn the Instant Pot to Sauté mode. Melt the butter and brown the goat meat, stirring frequently for 5–10 minutes.
Once the meat is evenly browned, remove it from the pot and set aside.
Sauté the onion, celery, and garlic for about 5 minutes, stirring often, until soft and translucent.
Turn off Sauté mode. Add the bone broth, browned meat, and seasonings. Stir to combine. Close the lid, seal the valve, and cook on High Pressure for 25 minutes. Let it naturally release for 10 minutes, then carefully open the lid.
Check the meat for tenderness. If it’s not tender enough, cook for 10 more minutes under pressure. Otherwise, add the cubed squash, switch to Sauté, and cook for 10–15 minutes, stirring occasionally, until the squash is soft and the stew has thickened to your liking.
Adjust seasoning if needed, then serve warm, garnished with fresh parsley.