CrossWord Puzzle Monday

1234567
Across
  1. 1. A Japanese dish; small balls or rolls of vinegar-flavoured cold rice served with a garnish of vegetables/egg/raw seafood
  2. 3. Cookie filled with cream; snack since 1912
  3. 5. the series of vertebrae extending from the skull to the pelvis; the spine
  4. 7. An area surrounded by seating in which various events can be held
Down
  1. 2. An extremely small amount
  2. 4. A flightless seabird of the southern hemisphere; wings developed into flippers for swimming under water
  3. 6. Superhero in comics published by DC Comics; considered a great detective