Begin by preparing your marinade. In a large bowl, whisk together olive oil, lime juice and zest and seasonings. Add chicken tenders with tongs, and make sure to toss until well coated. Cover and refrigerate while preparing relish and heating up grill.
Next, make the Piña Colada Fruit Relish. In a medium bowl, delicately mix together all ingredients. Refrigerate until ready to serve.
On a heated charcoal grill, gas grill or grill pan, grill tenders on the first side for 6-7 minutes. Flip, then grill an additional 4-5 minutes or until chicken is just cooked through. Transfer with tongs to a sheet pan tented with foil.
Arrange chicken tenders on a serving platter. Serve topped with drizzle of olive oil, flaky salt and plenty of the Piña Colada Fruit Relish atop and falling off the sides. Finish with lime wedges and fresh mint sprigs.
If saving leftovers, make sure to store chicken separately from relish as pineapple contains an enzyme that can cause meat textures to disintegrate over an extended time.