Preheat your oven to 425°F and line a baking sheet with parchment paper.
In a small bowl, mix the cornstarch with chili powder, garlic powder, salt, and black pepper.
Pat the cod fillet dry and lightly coat it with the dry spice-cornstarch mixture.
Place the seasoned cod on the prepared baking sheet and lightly spray with olive oil.
Bake the fish for 12-15 minutes, or until the fish flakes easily with a fork.
While the fish is baking, combine the shredded cabbage and carrot in a bowl.
Squeeze the lime wedge over the slaw and toss with chopped cilantro.
In a separate small bowl, stir the Greek yogurt with a pinch of salt and a squeeze of lime to create a light, tangy sauce.
Warm the corn tortillas in a dry skillet for about 30 seconds on each side.
Assemble the tacos by placing chunks of baked fish onto each tortilla, topping with a generous portion of cabbage slaw, and drizzling with the yogurt sauce.
Serve immediately and enjoy your crispy baked fish tacos!