Lasagna with artichokes and spinach   Prep time: 20 mins Cook time: 30 mins Total time: 50 mins Serves: 4 Ingredients 400 g of lasagna 8 artichoke hearts frozen 500 g spinach The juice of 1 lemon 30 g of white flour 75 of butter 100 ml of milk Grated Parmesan cheese Nutmeg Extra