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½ cup onion, finely chopped |
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2 lb 4 oz (1 k) mushrooms or portobellos, sliced or quartered |
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1 cup tomatoes, peeled, seeded and chopped |
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1 tablespoon balsamic vinegar |
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2 tablespoons tomato paste |
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2 tablespoons parsley leaves, chopped |
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2 cups heavy cream (undiluted evaporated milk may be used instead) |
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4 tablespoons cream cheese |
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4 – 6 tablespoons grated parmesan cheese |