Ingredients

• 1 small head cauliflower (1 to 1 1/2 pounds), leaves discarded
• 1/2 cup vegetable oil
• 1/4 cup plus 3 tablespoons olive oil, divided
• 4 (1-inch-thick) pieces striped bass or mahi mahi fillet with skin (6 ounces each)
• 2 tablespoons fresh lemon juice
• an adjustable-blade slicer
• a green salad

Instructions

1. Shave floret portion of cauliflower with a knife to create cauliflower "confetti" (3 to 4 cups). Set aside. With slicer, cut thin lengthwise slices from base and stem, dividing among 4 plates.
2. Heat vegetable oil and 1/4 cup olive oil in a 12- to 14-inch nonstick skillet over medium heat until oil shimmers, then fry cauliflower "confetti" in 4 batches, stirring occasionally, until golden brown, about 3 minutes per batch. Transfer with a slotted spoon to paper towels to drain, seasoning lightly with salt.
3. Discard oil and wipe out skillet. Heat 1 tablespoon olive oil in skillet over medium heat until it shimmers. Season fish with 1 tablespoon salt and 1/2 teaspoon pepper. Sear, skin side down, 8 minutes. Turn fish and cook until just cooked through, 3 to 4 minutes.
4. Whisk together remaining 2 tablespoons olive oil, lemon juice, and 1/2 teaspoon salt.
5. Place fish, skin side up, on top of cauliflower slices. Top with cauliflower confetti and drizzle with vinaigrette.