Preheat oven to 400.
Line a sheet with parchment paper.
Sprinkler shredded cheese on sheet.
Add a single layer of onions slices.
Brush 1 tbsp olive oil on onions.
Mix 1/2 tsp salt, 1/2 tsp garlic powder, 1/2 tsp paprika and 1/4 tsp black pepper together.
Sprinkle spice on top of onions.
Bake for 18 - 20 minutes.