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Bring a large pot of water to a boil and salt it well.
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Meanwhile, heat a pan to medium-high heat and sauté the beef in olive oil for 4-5 minutes or until browned and crumbled.
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Add the chipotle sauce and poblano (if using), and sauté for 1 minute.
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Add the crushed tomatoes, season with salt and pepper; simmer for 3-4 minutes. If your sauce tastes a bit metallic, add a bit of sugar to round out the flavors.
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Cook the pasta according to the package directions, drain and toss with the hot sauce, top with the cheese before serving.