Preparation:
Preheat over to 350°F.
In a bowl, mix the cream chesse, pesto, parsley and chives. Refrigerate while you prepare other ingredients.
remove stains from the mushrooms and arrange on a cookie sheet, drizzle with olive oil and season with salt and pepper. Cook in the oven for five minutes, until just softened.
Meanwhile, slice the sausages into 36 rounds (about 1/2 inch thick). Cook in a pan until golden on both sides then let cool completely (they can be prepared ahead and kept in the refrigerator).
Fill each mushroom with 1/2 tablespoon of the cream cheese, arrange a sausage slice on top and a tomato slice or cap.
Secure with a decorative toothpick and serve at room temperature.