Brown the hamburger, carrot, and celery in the oil. Put all ingredients together except cheeses. Boil for 1 1/2 hours.
White sauce (Besciamelle):
1/3 cup butter 4 cups milk
3 T flour (or 1 T more)
Cook until thickened and reserve for layering.
Cook 18 noodles (for 2 pans of lasagna) Start with meat sauce then noodles. Add white sauce, meat sauce, mozzarella, and parmesan cheese. 2nd layer, repeat steps and after 3rd layer of noodles top with sauce and cheese. Bake 320 uncovered 40 minutes. Best to make 2 pans. Freeze 1 for later use. Freeze uncooked