INGREDIENTS
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2 tablespoons olive oil
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1 tablespoon butter
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8 ounces cremini (brown button mushrooms, cleaned and sliced)
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3/4 cup diced onion
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3 tablespoons minced fresh Italian flat-leaf parsley
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1 teaspoon minced garlic
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1/2 teaspoon salt
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fresh ground black pepper (to taste)
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2 pounds lean ground beef
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2 beaten eggs
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1/2 cup ketchup
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1/2 cup Italian-style bread crumbs
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1 tablespoon Dijon mustard
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1 tablespoon Worcstershire sauce
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1/2 teaspoon Lawry’s Seasoned Salt
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3 cups low-sodium beef broth
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1 teaspoon Dijon mustard
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1 teaspoon Worcestershire sauce
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2 tablespoons water
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2 tablespoons cornstarch
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1/3 cup sour cream
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salt and fresh ground black pepper (to taste)