In a bowl, add the marinade ingredients: extra-virgin olive oil, lemon juice, parsley, garlic, basil, pepper and salt. Whisk to combine.
Pour the marinade into a resealable plastic bag, add the tilapia fillets and coat them with the marinade. Seal the bag, squeezing out any excess air. Marinate the fillets in the refrigerator for at least 1 hour.
While the tilapia is marinating, make the mango salsa: combine the mango, red bell pepper, red onion, cilantro, and jalapeno pepper in a bowl. Add the lime juice and lemon juice, and toss well to coat. Season to taste with salt and pepper, and chill in the refrigerator until ready to serve.
Set a grill pan over medium-high heat and add olive oil. If using an outdoor grill, preheat the grill to medium-high, and lightly oil the grate.5. Remove the tilapia from the resealable bag and shake off the excess marinade. Discard the bag and the remaining marinade.
Cook the fillets until the tilapia is no longer translucent in the center, and flakes easily with a fork – usually about 3 to 4 minutes per side, depending on the thickness of the fillets.
Spoon the mango salsa over the cooked tilapia fillets, serve and enjoy!