Your recipe sounds great and I actually like spinach in things, just not by itself if cooked. Your recipe sounds like an Impossible Pie recipe where there is no crust or very little flour in the recipe that will sink down to the bottom while baking to make very little crust. I like those recipes when I making a dessert for someone that is trying to go "glutton". In those times I'll use almond flour.
Great recipe, thanks. I'd add some mushrooms to the mix too. I'm one of those that like to clean out the freezer or fridge so it becomes more like.......everything but the kitchen sink.............recipe.