INGREDIENTS
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2 tablespoons extra-virgin olive oil, divided
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1/2 small yellow onion, finely chopped
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1 garlic clove, finely chopped
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1/2 pound smoked trout, skin removed and fish flaked
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1/2 cup sour cream
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1/2 cup mayonnaise
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1/2 cup finely grated Parmigiano-Reggiano
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1/2 cup finely grated mild white cheddar
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Zest and juice of 1/2 lemon
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1 1/2 tablespoons finely chopped chives
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Kosher salt
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Pinch ground white pepper
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1/2 loaf sourdough bread, thinly sliced