Firstly, wash and rinse the dal, and keep it aside. On the Instant Pot, Press SAUTE mode. Heat oil, and when it's hot, add cumin seeds. Allow them to crackle.
Add minced garlic, ginger, and green chilies, and saute till the raw aroma of ginger and garlic goes away.
Add chopped tomatoes, turmeric, red chili powder, and salt. Cook for 2-3 minutes until the tomatoes are soft and mushy.
Next, add the rinsed dal, water, and give a stir.
Close the Instant Pot with a pressure valve to Sealing. Cook on High Pressure for 8 minutes.Once the pot beeps, let the pressure release naturally (NPR) for 10 minutes. Add chopped baby spinach, garam masala, and lemon juice. Stir well and simmer for 1-2 minutes until the spinach wilts to your preference. You can adjust the consistency of the palak dal at this point.
Pressure Cooker Spinach dal is ready.