Preheat the oven to 180c regular bake.
Heat oil in a large frying pan, brown chicken, and bake with pumpkin in the oven.
Cook onion and garlic in the same pan, add wine, tomato paste, stock, tomatoes, herbs, balsamic, spinach, and shredded chicken.
Make the cheese sauce by melting butter, adding flour, then milk and cheese. Season to taste.
Layer the lasagne in a baking dish with the tomato mixture, cheese sauce, lasagne sheets, and mashed pumpkin. Repeat layers, finishing with white sauce and extra cheese.
Cover with foil, bake for 35 minutes, then remove foil and grill until golden brown. Rest for 10 minutes before serving.
