Preheat oven to 400 degrees. Lightly coat a medium baking dish with nonstick cooking spray. Mix garlic, olive oil, parsley, tomatoes and feta in a medium bowl. Lightly coat both sides of tilapia fillets with nonstick cooking spray, then season both sides with salt and pepper. Lay fillets side by side, barely touching, in prepared baking dish. Top evenly with tomato mixture. Bake 13-17 minutes, or until fish flakes with a fork and is no longer translucent. Serve immediately.