Set oven to 350 degrees.
Arrange the tilapia on a baking sheet lined with parchment paper.
In a bowl mix all the other ingredients together well, except for the lemon slices.
Pour the sauce over the tilapia evenly.
Lay a lemon slice on each piece of fish and let it sit for 15 minutes.
Bake for 15 minutes at the middle of the oven.