Activate the Sauté on normal/medium (not high). When the pot is warm, drizzle in the oil and add the onions. Let them cook for about 5 minutes or until they're soft and fragrant, stirring occasionally.
Add the garlic, sweet potatoes, zucchini, carrots, ginger, curry paste, turmeric, salt, and pepper to the pot. Stir everything until mixed and sauté the vegetables for another 5 minutes or so, stirring often.
While the veggies are cooking, dump your uncooked lentils into a colander and rinse them under cool water, going through them with your hands to look for any hardened bits or small rocks (it happens). When clear, stir the lentils into the Instant Pot coating them in the spices.
Cancel the Sauté function. Now, stir in the coconut milk and vegetable broth; stir everything well until it's all blended.
Lock the lid into place, set the valve to "Sealing", and cook on HIGH pressure for 15 minutes. When it's done, let the pressure release naturally. This should only take about 10-15 minutes, but after 15 minutes you can manually release if needed.
Open the lid and give everything a good stir. Serve with fresh bread and a lime wedge. (I love adding a spritz of fresh lemon juice to my soups, but lime works really well with these flavors!)