Sole Meuniere

1. Preheat the oven to 200 degrees F. Place an oven-safe platter in the oven to warm.
2. Spread the flour on a plate or pie dish. Heat the Clarified Butter in a large nonstick skillet over medium-high heat. Meanwhile, sprinkle the fish with salt and pepper on both sides. Dredge the fish in the flour and shake off any excess. Once the Clarified Butter is hot, add the fish to the skillet and sear, occasionally basting the fish with the butter in the skillet, until golden brown, 1 to 1 1/2 minutes. Carefully turn the fish over and cook the other side until golden but the fish is still slightly springy to the touch, about another minute. (If the fish flakes easily, it's overcooked.) Transfer the fish to the warmed platter.
3. Return the skillet to medium-high heat and add the European butter. Cook until it melts, then turns lightly browned and smells nutty. Add the capers, if using, and season with salt and pepper. Add the lemon juice—the butter will splutter—and swirl the skillet to incorporate. Spoon the sauce over the fish, then garnish with the parsley and serve.

Clarified Butter:

1. Melt the butter in a small saucepan over medium-high heat. Continue to cook until a layer of white milk solids floats to the surface and the butter becomes foamy. Lower the heat to medium and continue to gently boil. The milk solids will sink to the bottom of the pan. Once the boiling has stopped, pour the butter through a cheesecloth-lined strainer into a glass measuring cup or heatproof bowl to filter out the milk solids. Cover and store in the refrigerator.