1-First Step: Prepare the baking sheet and season the fish Start by lining a large baking sheet with parchment paper or a silicone liner. This keeps cleanup easy and helps the fish lift off without sticking. Place the tilapia on the sheet and season both sides with 0.5 teaspoon cumin, 0.5 teaspoon cayenne pepper, 1 teaspoon salt, and 0.25 teaspoon black pepper. Next, lightly drizzle the fish with 1 tablespoon olive oil and dot it with 1 tablespoon unsalted butter. The oil helps the seasoning stick, while the butter adds rich flavor and keeps the fish moist in the oven. If you are making this for kids or anyone sensitive to spice, you can reduce the cayenne or leave it out.

2-Second Step: Bake the tilapia Bake the seasoned tilapia at 375°F for 20 to 25 minutes. The exact time depends on the thickness of the fish, so check it near the end. The fish should flake easily with a fork when it is done. If you like a little crisp edge, turn on the broiler for 3 to 5 minutes at the end. Watch it closely so the fish does not burn. That short broil gives the top a nice browned finish and makes the fish tacos taste even better. For readers who want another seafood idea with a similar easy method, try garlic grilled shrimp for a quick and tasty dinner.

3-Third Step: Mix the fish taco sauce While the fish bakes, make the sauce. In a small bowl, mix 0.5 cup sour cream, 0.33 cup mayonnaise, 2 tablespoons lime juice, 1 teaspoon garlic powder, and 1 teaspoon Sriracha sauce. Stir until smooth and creamy. This sauce is the heart of the recipe. It is cool, tangy, a little spicy, and perfect with the flaky fish. If you want more heat, add a little more Sriracha. If you want it milder, use a smaller amount and taste as you go. The best fish taco sauce should taste creamy, bright, and just a little spicy. That mix keeps every bite lively.

4-Fourth Step: Prep the toppings While the fish and sauce are coming together, get the toppings ready. Shred the purple cabbage, slice the avocados, dice the red onion, chop the cilantro, and grate the Cotija cheese. If you are using the roma tomatoes, dice them now as well. Try to keep the toppings separate so each person can build their own taco the way they like it. That makes dinner feel a little more fun and works especially well for families or guests. You can also set out extra lime wedges for serving.

5-Fifth Step: Warm the tortillas Warm the 24 small white corn tortillas on a dry skillet or griddle over medium-high heat. A few seconds per side is usually enough. You want them soft, flexible, and lightly toasted. This step adds flavor and helps the tortillas hold up when you add the fish and toppings. Cold tortillas tend to crack, so do not skip this part. If you are cooking for a crowd, wrap the warmed tortillas in a clean kitchen towel to keep them soft.

6-Final Step: Assemble and serve Once the fish is cooked, flake it into pieces. Fill each tortilla with fish, purple cabbage, avocado, tomatoes if using, red onion, cilantro, Cotija cheese, and a spoonful of sauce. Finish with a squeeze from a lime wedge. Serve the fish tacos right away while the tortillas are warm and the fish is fresh. If you want a bigger meal, serve them with rice, beans, or a simple salad. For more weeknight dinner inspiration, take a look at baked ziti when you need a family-friendly comfort meal.