Add the rinsed red lentils, diced onion, minced garlic, minced ginger, cumin, turmeric, curry powder, vegetable broth, and salt to the Instant Pot and stir to combine.
Secure the lid, set the valve to sealing, and cook on manual high pressure for 10 minutes.
Quick release the pressure once the timer ends, then open the lid and stir in the spinach until it wilts.
Stir in the lemon juice, taste for salt, and ladle into bowls. Top each serving with the chopped cilantro.