Preheat the oven to 425°F. Line a baking sheet with parchment paper.

Place tofu on a cutting board and slice lengthwise into 4 thin pieces. Stack the pieces and slice again from the other side so that you now have 16 pieces. Arrange the tofu slices in a single layer on the prepared baking sheet. Bake in the preheated oven for 10 minutes. Carefully turn the tofu slices over and cook for 10 minutes. (Total baking time = 20 minutes.)

While the tofu is baking, prepare the hollandaise sauce. Set a small saucepan over medium heat. Add the mayonnaise, butter, lemon juice, cayenne pepper sauce, turmeric, and black pepper. Whisk to combine.

Cook, stirring frequently, for 2 minutes or until heated through. Do not let the sauce come to a boil; reduce the heat as needed. Set aside.

Set a large skillet over medium heat and add the olive oil. When the oil is hot, add the spinach leaves. Cook for 2-3 minutes, stirring frequently, until the spinach is wilted. While the spinach is cooking, toast the English muffins.

Place open-faced English muffin halves on each plate. Top with spinach and baked tofu slices. Spoon hollandaise sauce over the top and serve warm.