Preheat your oven to 375°F (190°C). Bake chicken tenders on a baking sheet according to package instructions (15-20 minutes).
While chicken is baking, slice slider buns horizontally while keeping them connected at the back. Place bottom halves in a baking dish and spread marinara sauce evenly over them.
Once cooked, layer chicken tenders on the sauced buns and top each with mozzarella cheese.
Halve green olives and place two halves on each cheese slice for an adorable touch.
Place top halves of buns over the assembled layers and bake for 10-15 minutes until cheese is melted and buns are golden.
Let rest for 5 minutes before slicing and serving warm.