Place one oven rack on the middle shelf and preheat the oven to 350F. Line a large baking sheet with parchment paper.
Bake:
Place the sliced bell peppers onto the baking sheet and bake for 5 minutes.
Remove from the oven and top with taco meat, salsa, cheese, black olives, and any other toppings you want to be heated.
Place the baking sheet in the oven and bake until the cheese is melted, about 5 minutes.
Remove the nachos from the oven and allow them to cool before serving.
To pack for lunch:
If packing into lunch containers, allow the nachos to cool down to room temperature before packing into lunch containers. Pack the guacamole and sour cream into separate sauce containers.
Refrigerate until ready to pack in a lunch bag.
Notes
Nutrition information is calculated without guacamole and sour cream.