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1
Place the sweet potatoes in a medium pot and cover with cold water (plus a few inches). Bring to a boil, then reduce heat to medium and simmer until potatoes are tender when pricked with a fork, about 15 minutes.
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2
Drain the potatoes and return to the pot. Add the garlic paste, sour cream, buttermilk, 3 tablespoons of butter, and salt and pepper to taste. Mash well and set aside.
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3
Heat 1 teaspoon olive oil in a large pan until hot. Add the baby spinach and lemon zest and cook until just wilted. Remove from the pan and set aside. Once cool enough to handle, chop the spinach roughly.
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4
Heat another teaspoon of olive oil in the same pan and add the diced zucchini. Season with salt and pepper and cook on medium-high heat for about 4 minutes, until softened and starting to brown. Remove from the pan and set aside with the chopped spinach.
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5
Heat 2 teaspoons of oil in the same pan. Once hot, add the salmon (skin-side down). Cook for about 3 to 4 minutes on the first side, then flip and add the remaining 3 tablespoons of butter and lemon juice to the pan. Cook for 3 more minutes, constantly spooning the lemon butter over the salmon as it cooks. Transfer to a plate.
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6
Spoon mashed sweet potatoes onto each plate, top with the zucchini and spinach, then finish with a salmon fillet.
