Pam's Poached Fish Soup
Ingredients:
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1 tablespoon butter, or more to taste
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⅓ cup diced onion
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⅓ cup diced celery
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⅓ cup diced carrot
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4 cups chicken broth
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1 (14.5 ounce) can diced tomatoes with Italian herbs
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⅓ cup white wine
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⅓ cup lemon juice
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1 pound tilapia fillets, or more to taste
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1 ½ teaspoons dried Italian herbs
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salt and ground black pepper to taste