Preheat the oven to 425°F and line a baking sheet with parchment paper.
In a shallow bowl, combine the panko breadcrumbs, cumin, and paprika.
In another small bowl, whisk the egg white until slightly frothy.
Pat the 6-ounce cod fillet dry with paper towels, then lightly brush with olive oil cooking spray.
Dip the cod fillet into the egg white, ensuring an even coat, then dredge it in the breadcrumb mixture until well covered.
Place the breaded fish on the prepared baking sheet and spray lightly with olive oil.
Bake the fish for 12-15 minutes until it is cooked through and the coating is crispy.
While the fish is baking, prepare the slaw by placing shredded cabbage in a bowl and tossing with lime juice and Greek yogurt.
Warm the corn tortillas in a skillet or microwave until soft and pliable.
Assemble the tacos by placing pieces of the crispy fish onto the tortillas and topping with the fresh cabbage slaw.
Serve immediately with an optional extra squeeze of lime if desired.