Preheat oven to 350°F. Arrange chopped walnuts on a sheet pan and toast on the top rack of the oven for 10 minutes, stirring halfway through.
While the nuts are toasting, prep the rest of the fruit and combine it in a large bowl.
Stir the fruit with the orange juice and cinnamon, adding more of each if desired, to taste.
Stir in the chocolate chips and toasted walnuts immediately before serving. Top with additional chocolate chips and toasted walnuts if desired.