Step 1

Toss paneer with turmeric in a medium bowl until coated. Heat 1 tablespoon oil in a large nonstick skillet over medium heat. Add the paneer and cook, flipping once, until browned on both sides, about 5 minutes. Transfer to a plate.

Step 2

Add the remaining 1 tablespoon oil to the pan. Add onion and jalapeño (if using) and cook, stirring frequently, until golden brown, 7 to 8 minutes. (If the pan seems dry during cooking, add a little water, 2 tablespoons at a time.) Add garlic, ginger, garam masala and cumin. Cook, stirring, until fragrant, about 30 seconds. Add spinach and salt. Cook, stirring, until hot, about 3 minutes. Remove from the heat and stir in yogurt and paneer.