Preheat the oven to 375 degrees and line a baking sheet with parchment.

Separate dough into triangles; spread each with a little Dijon.

Place sausage and an apple slice at each wide end; roll up.

Place on the sheet, brush with beaten egg, and arrange seam-side down.

Bake 15 to 18 minutes until golden and puffed, then serve warm.