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Cook pasta according to directions, drain.
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Heat olive oil in a pan then add rosemary, garlic, ground beef, onion and red bell pepper.
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Cook until the onions are soft and the beef starts to brown.
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Add tomatoes and tomato paste to the pan and bring to the boil.
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Reduce heat and simmer for 15 minutes until the beef is cooked and the red bell pepper is tender.
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Season with salt and pepper to taste.
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Divide pasta into 4 bowls and top each with sauce. Sprinkle with grated parmesan cheese and serve.