Porcini Mushroom and Spinach Vegan Quiche

oat drink 29.0% , wheat flour 23.5% , mushroom 18.0% , water 13.0% , onion 12.3% , spinach 8.0% , vegetable oil 0.0% , spelt flour 0.0% , Food Preparation with Palm Oil 0.0% , cannellini beans 0.0% , corn flour 0.0% , butternut squash 0.0% , lemon juice 0.0% , kale 0.0% , salt 0.0% , parsley 0.0% , garlic puree 0.0% , brown flax seeds 0.0% , golden flax seeds 0.0% , poppyseed 0.0% , black pepper 0.0% , millet 0.0% , paprika 0.0% , cayenne pepper 0.0% , yeast 0.0%