Rub each cod filet with the olive oil, then coat the flesh and skin with the blackening seasoning. Meanwhile, heat a cast iron pan over medium-high. Gently place the fish in the pan skin side down, pressing on the fish slightly to prevent the skin from curling. Allow the skin side to sear for a few minutes until it naturally releases from the pan and the outside has a slight char. Carefully flip the fish and repeat on the flesh side. When fish is cooked through, remove and set to the side.
To the same cast iron pan, add the frozen corn and saute over high heat until hot and lightly charred.
Assemble the taco bowls with a base of cilantro lime rice, 1 piece of blackened fish, a scoop of cabbage slaw, a scoop of corn, and a scoop of mango salsa. Garnish with any remaining chopped cilantro and serve a lime wedge on the side.
Cilantro Cabbage Slaw
To a mixing bowl, add shredded cabbage, cilantro, sour cream, lime juice, and a pinch of kosher salt. Mix until fully combined and creamy. Set aside or store in the fridge.
Mango Salsa
To a mixing bowl, add diced mango, red bell pepper, red onion, lime juice, cilantro, and salt to taste. Mix to combine.
Cilantro Lime Rice
Heat the cooked white rice if needed, then add to a large bowl along with lime juice and cilantro. Toss to combine until fluffy.