Nana's Tuna Casserole Surprise

   16 oz Tuna (2 cans); drained
    2 c  Total Cereal
    2 tb Extra virgin olive oil
    1    Can cream of mushroom soup
    2 ts Garlic powder or salt
  1/4 c  Onions; minced
1 1/2 c  Swiss cheese; shredded
  1/2 c  Dry roasted peanuts

Preheat oven to 325 F. Combine tuna, cereal, onions, garlic powder,
oil, and soup in large mixing bowl. Spread mixture in 9x13" casserole
dish. Top with cheese and peanuts. Bake for 30 minutes.

Note:

This has been in my family for at least 30 years. The story goes that
one day my Nana received a call from Grandpa who told her to expect
company that evening for dinner. She frantically threw together this
delightful little casserole and completely astonished the guests. The
ingredients are simple, but the flavors and textures combine in such
a way that one is often unable to forget.