Sticky Blender Solution: Did you know that your blender will wash itself? Yep. Just fill it 2/3 water and a drop of dish soap. Blend until clean.
The volume of this dish depends on how you cook the spinach. If you use the second method, or substitute frozen spinach, the spinach is evenly cooked. If significantly reduced, you may need to hold back some of the sauce (or add more spinach). This is why I prefer the first method, as some of the spinach leaves remain large and fresh looking. Cooking in cast iron skillets is a bit “touchy.” but it can work. A stainless steel skillet would be easier. Either way, keep the heat low and stir constantly.