Preheat the oven to 375°F (190°C) and line a rimmed baking sheet with parchment or lightly grease it.
Open the crescent roll can and separate the dough into 8 triangles on a clean surface.
Pour the spaghetti sauce into a shallow bowl.
Place one half slice of mozzarella on each crescent triangle.
Dip each frozen breaded chicken finger into the sauce to coat, then place it on top of the cheese on the crescent triangle.
Roll each crescent up around the chicken finger, sealing the edges, and place seam-side down on the prepared baking sheet.
Lightly sprinkle about 1 tsp garlic powder evenly over the 8 rolls (approximately 1 tsp total).
Bake the rolls for 15 minutes, then remove the baking sheet from the oven.
Top each roll with the remaining mozzarella half slice, return to the oven, and bake an additional 5–8 minutes until the cheese is melted and the crescents are golden and cooked through.
Remove from the oven and let cool briefly before serving.
