Barramundi Fillets with Roasted Sweet Potatoes and Brussels Sprout Chips

Place on sheet of aluminum foil and roast 30 minutes.

Turn potatoes over and roast until soft, about 20 minutes longer.

Let stand until cool enough to handle.

Scoop flesh into processor; discard skins.

Puree sweet potatoes until smooth.

Add 3 tablespoons butter, thyme, nutmeg, and remaining 2 teaspoons lime juice; process until blended and smooth.

Add milk; process to blend.

Transfer to microwave-safe bowl.

Season to taste with salt and pepper.

DO AHEAD: Vinaigrette and potatoes can be made 1 day ahead.

Cover separately and chill.

Bring vinaigrette to room temperature and rewhisk before using.

Preheat oven to 450°F.

Place brussels sprout leaves on rimmed baking sheet.

Drizzle with 1 tablespoon oil, sprinkle with salt and pepper, and toss to coat.

Spread leaves out in even layer.

Roast until almost all leaves are brown in spots and crisp, tossing occasionally, about 15 minutes.

Meanwhile, heat remaining 2 tablespoons oil in heavy large skillet over medium-high heat.

Sprinkle fish with salt and pepper.

Add to skillet and cook 30 seconds.

Reduce heat to medium and add remaining 2 tablespoons butter to skillet.

Continue to cook fish until edges appear opaque, occasionally basting by spooning juices in skillet over, about 4 minutes.

Turn fish over.

Cook until just opaque in center, about 2 minutes.

Rewarm sweet potatoes in microwave in 30-second intervals until heated through, stirring occasionally.

Divide sweet potatoes among plates.

Arrange fish alongside and drizzle vinaigrette over.

Sprinkle brussels sprout chips over and serve.

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