Preheat oven to 350 degrees Fahrenheit (180 degrees Celsius).

Lay tilapia slices on a baking sheet lined with Gefen Parchment. Lightly season with salt, pepper, paprika, onion powder, and garlic powder.

In a medium bowl, stir together the olive oil, lemon juice, capers, garlic, rosemary, salt, and pepper and pour over the tilapia. (You can use a pastry brush to make sure the fish is coated evenly.)

Place a lemon slice on each piece of fish. Allow to stand at room temperature for 15 minutes. Bake on the center rack of your oven for 20 minutes.