INGREDIENTS
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White Cheddar Macaroni and Cheese boxed dinner, prepared according to box directions
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1 tsp olive oil
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1 large onion (or two small ones), halved and sliced to make thin strips
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dash of salt
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1 tsp fresh thyme (or dried)
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1 tbsp beef broth
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1/2 cup Swiss cheese, shredded
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1/4 cup crushed croutons