Creating Tropical Orange Jello Salad is straightforward. Follow these steps for a delicious outcome:

1. Dissolve Jello: In a medium bowl, dissolve the orange jello in 1 cup of boiling water. Stir well until completely dissolved.
2. Add Cold Water: Stir in 1 cup of cold water and mix thoroughly.
3. Mix in Fruits: Add the drained crushed pineapple and mandarin oranges to the jello mixture. Stir to combine.
4. Incorporate Marshmallows: Gently fold in the mini marshmallows, shredded coconut, and chopped nuts if using.
5. Transfer to a Mold: Pour the mixture into a mold or serving dish. Cover with plastic wrap.
6. Chill: Place in the refrigerator and allow to chill for at least 2-4 hours until set. For best results, let it chill overnight.
7. Garnish: Before serving, top with whipped topping if desired for added creaminess.
8. Serve: Cut into squares or scoop out portions and serve chilled.

These steps will guide you in creating this incredible salad easily and efficiently.