Place steaming rack in Instant Pot. Add 3/4 cup water.
Pour spinach leaves into pot. Place garlic, ginger, onion, and spices over spinach.
Put a square of parchment into the pot, and lay the tofu block on top of it.
Close lid, set valve to sealing, and cook on manual high pressure for 5 minutes. Perform quick release when done.
Carefully remove tofu block and cut tofu into 1" pieces.
Remove steaming rack. Put spinach, spices, and any liquid in the pot into a blender and blend 30 seconds or until desired smoothness.
Pour spinach sauce into serving bowl. Stir in vegan yogurt if desired. Add in tofu blocks. Serve with rice, naan, etc.
As an extra garnish, sprinkle with extra turmeric, chili flakes, more vegan yogurt, and cumin seeds.