These ham and cheese crescent roll-ups are an adaptation of a simple and popular French dish, widely used to recycle unsold or stale croissants. If desired, add spinach, tomato, or cream cheese inside the roll-ups.
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Preheat the oven to 375 degrees.
Gently separate the dough into 8 triangles. Using the crescent triangles as a pattern, cut the ham and cheese into similar triangular shapes. Place a piece of ham on the crescent dough and top with a slice of cheese. Roll each croissant starting from the widest edge to the tip of the triangle.
Coat a baking sheet with cooking spray or line with parchment paper. Place the triangles on the baking sheet. Bake until golden brown, 15 minutes. Eat warm, cold, or at room temperature.