Prepare the sweet potatoes: Peel the sweet potatoes and dice them into evenly-sized pieces.
Add the ingredients to the Instant Pot: Place the diced sweet potatoes in the Instant Pot along with olive oil, almond milk, dried thyme, dried oregano, nutmeg, sea salt, and freshly ground pepper. Stir to coat the sweet potatoes with the seasonings.
Pressure cook the sweet potatoes: Close the Instant Pot lid and set the valve to the sealing position. Select the "Manual" or "Pressure Cook" function and set the cooking time to 8 minutes on high pressure. The Instant Pot will take some time to come to pressure before the cooking time starts.
Natural release and mash: Once the cooking time is complete, allow the pressure to naturally release for about 10 minutes. Then carefully release any remaining pressure manually. Open the Instant Pot lid and use a potato masher or an electric mixer to mash the sweet potatoes until they reach the desired consistency.
Adjust seasoning and serve: Taste the mashed sweet potatoes and adjust the seasoning if needed. Add more salt, pepper, or herbs according to your preference. Transfer the mashed sweet potatoes to a serving dish, sprinkle with fresh parsley, and serve hot.
Enjoy the creamy and flavorful mashed sweet potatoes as a comforting side dish for your meal. They pair well with roasted vegetables, grilled proteins, or can be enjoyed on their own.