Wash the chives. Cut off the tips about 6 cm long and put aside. Mix cream cheese and milk. Season with salt and pepper. Open can, unroll dough and separate into triangles.
Cover each with 1 slice of cooked ham. Spread prepared cream cheese on top. Roll up loosely from the wide side. Place cut chives under the thinly tapered tip of the dough.
Press on lightly. Place on a baking tray lined with baking paper. Brush with whisked egg yolk and bake in a preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for 12-15 minutes.
Garnish with cherry tomatoes and parsley and serve oven-fresh.