Sambo is actually an Irish and Australian slang for sandwich.
I really like how the sambo/sandwich turns out. I cut the sandwich with corrugated knife. The fillings for the sandwich are ham, cheese, lettuce, and tomato ketchup.
So the boys had similar lunches. For each box, contains :
1. Ham and cheese sambos
2. Mini arancini ball (recipe here)
3. Homemade chicken nuggets (recipe here) with BBQ sauce
4. Red seedless grapes for recess