INGREDIENTS
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½ cup olive oil
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4 cloves garlic, sliced
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1-3 Fresno or serrano chiles (1 for medium-spicy, 2 for pretty spicy, 3 for super-spicy)
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¾ lb rigatoni
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8 cups packed hearty greens (such as collard greens, kale, or Swiss chard), stems removed, roughly chopped
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1 large yellow onion, thinly sliced
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1 lb hot Italian sausage, removed from casings
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Kosher salt and ground black pepper
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1½ cups fresh ricotta cheese (¾ lb)