Ingredients:

• 1 tablespoon extra virgin olive oil
• 1/2 (about 1/2 cup) yellow onion, diced
• 1 pound firm or extra firm tofu packed in water, drained well
• 1 teaspoon nutritional yeast
• 1/2 teaspoon kosher salt, plus more to taste
• 1/4 teaspoon freshly ground black pepper, plus more to taste
• 1/4 teaspoon ground turmeric
• 4 cups loosely packed fresh spinach leaves
• 1/4 teaspoon lemon juice