Thaw your tilapia if needed, and thaw in the fridge overnight.

Lay out foil and spray with a bit of nonstick.

Rub both sides of your Tilapia with some olive oil

Season to taste with your blackening on both sides.

Fold your foil to make a packet around the fish fillet.

Turn your grill onto a low-medium heat.

Set your foil packet on either the upper or lower rack of the grill; if using the lower rack, you will need to keep a close eye on it as it cooks.

Use a meat thermometer to verify your fillet has cooked to 145 degrees.

Remove and serve.