Mushrooms and Chicken in Cream Sauce over Pasta

30 gr butter or margarine
1 tbsp olive oil
1 sliced onion
1 crushed clove garlic
60 gr chopped prosciuto
250 bite sized chicken pieces
125 gr sliced mushrooms
1 tomato, peeled, halved and sliced
1 tbsp tomato paste
1/2 cup white wine
250 ml cream
salt
pepper

Heat butter and oil in large frying pan. Add onion and garlic and stir over low heat until onion is tender. Add prosciutto to pan and fry until crisp. Add chicken and cook over medium heat for 3 minutes. Add mushrooms and cook for another 2 minutes. Add tomato and tomato paste and stir until combined. Add wine and stir. Bring to a boil. Reduce heat and simmer until liquid is reduced by half. Stir in cream, salt and pepper. Bring to a boil. Reduce heat and simmer until sauce begins to thicken.

Add sauce to pasta and toss to combine. Serve immediately, topped with grated parmesan.