Brunch casserole

  1 1/2 lb Ground beef
      1    Onion;large;finely chopped
      2 tb olive oil or butter
      2    garlic;cloves;minced
      1 cn Mushrooms;sliced;drained;4oz
      2 ts Salt
    1/2 ts Nutmeg
    1/2 ts Oregano;leaf
    1/2 pk Spinach;chopped;frozen*
      3 tb flour
      6    Eggs;beaten
    1/4 c  Milk;scalded
    1/2 c  Cheddar cheese;sharp;grated
 
  *thawed;drained
     In skillet, lightly brown ground beef and onion in olive oil; drain
  well.  Place in well-greased crock-pot. Stir in remaining ingredients
  except eggs, milk and cheese until well blended. Beat eggs and milk
  together.  Pour over other ingredients; stir well. Dust with additional
  nutmeg.  Cover and cook on LOW setting for 7 to 10 hours or until firm.
  Just before serving, sprinkle with grated cheese. 6 to 8 servings (About
  2-1/2 quarts)