Wholesome healthy autumn lasagna

Name: Wholesome healthy autumn lasagna
Prep time: 1 h 30 min
Cook time: 30 min
Total time: 2 h
Cuisine: European, Italian
Ingredients: 300 grams pumpkin (Hokkaido); 300 grams celeriac; 100 ml warm water; 3 turnips; 1 leek; 3 cloves garlic; 2 onions (yellow); 2 chili peppers (yellow or green); 1 tablespoon nutmeg; 1 tabelspoon olive oil; 1 tablespoon pumpkin seeds oil (if available); 250 grams mushrooms; 250 grams bacon strips; 1 tablespoon oil; 250 ml milk; 250 ml cooking cream; 250 grams grated cheese; 1,5 tablespoons butter; 1,5 tablespoons plain flour