Meatloaf: Very good with lots of sneaky nutrition

I do not eat much meat and it is rare that I eat red meat.  Here is one of those very rare exceptions.
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In a large bowl
3 lbs ground beef
1/2 cup dried onion     health     cognitive
1 cup mushrooms, finely chopped     health     cognitive
2 cups old fashioned rolled oats     health     cognitive
2 cups baby spinach, finely chopped     health     cognitive
1 cup celery, chopped     health     cognitive
2 15 oz cans tomato sauce     health     cognitive
1/4 cup chi seed     health     cognitive
1/4 cup flax seed     health     cognitive
6 eggs     health     cognitive
1/2 cup pure maple syrup     health     cognitive

Mix well.  I find it easier to mix with clean hands

Place into bread pans and then place into an oven, preheated to 400 degrees for 1 hour.

Allow to cool.  Best served fresh.  You can eat it just as it is or add a sauce, such as ketchup.
Leftovers can be heated in the microwave and it can be frozen for latter use.