Preheat the oven to 375°F.

Line a large baking sheet with parchment paper.

Season the tilapia fillets on both sides with the salt, pepper, and Italian seasoning. Arrange the fillets on the prepared baking sheet. Sprinkle the minced garlic and butter pieces evenly over fillets.

Slice the lemon half into 1/4-inch slices (4-6 slices). Lay slices on top of tilapia fillets.

Bake the tilapia on middle rack of oven until center of fish is just opaque and begins to flake with a fork, 7-9 minutes, depending on thickness of fillets.

Check to see that tilapia is done. Remove from oven or add time as needed.

Squeeze lemon juice over the fillets, and serve immediately.