I make my ambrosia salad the way my mother did.

Finely diced apples
Squirt with a lemon so they don't turn yellow
Finely chopped celery
Finely chopped walnuts
Can of pineapple chunks
Marischino cherries
Miniature marshmallows
Mayonaise, enought for the right consistency

I can make this the day before and it is super easy