1. Heat oven to 400° F. Place the baguette slices on a baking sheet and brush both sides of the bread with the oil. Bake until golden brown, 4 to 5 minutes per side.
2. Dividing evenly, top the toasted baguette slices with the roast beef, sour cream, pomegranate seeds, and scallion; season with ½ teaspoon each salt and pepper.
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