Combine the olive oil, lime juice, and chili powder in a small bowl and whisk to combine.
Place the fish in a shallow dish (like a glass cake pan). Pour the marinade over the fish. Sprinkle the jalapeno and cilantro over it and let it marinate for 15 to 20 minutes.
Meanwhile, prepare the slaw and toppings. To make slaw, toss shredded cabbage with red wine vinegar in a small mixing bowl. Season with salt and pepper to taste.
Heat a large heavy skillet over medium-high heat. Add in fish and cook for about 5 minutes per side. Actual cooking time will depend on the thickness of your fillet. The fish is done when it can easily be flaked with a fork.
Compile your tacos with fish, cabbage slaw, a little onion, tomato, cilantro and guacamole and a squirt of lime juice.
Looking for a great sauce for fish tacos? Try this one! You’ll need the following ingredients:
1 cup cilantro leaves
½ white onion
2 jalapenos, stems removed
1 teaspoon salt
1 cup heavy cream
2 tablespoon sour cream
Place all ingredients in a food processor or blender and blend until smooth