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Bring a large pot of salted water to a boil. Add the pasta and cook to al dente, reserving 1/4 cup of the starchy cooking water before draining.
While the pasta cooks, melt butter over medium-high heat in a large skillet. Add the corn and sauté for a minute or two to just barely cook the corn. Add the jalapeño and garlic, and stir to combine. Season with 1/2 teaspoon of salt and the chili powder. Add in the heavy cream and reserved pasta water, and bring to a boil. Turn off the heat and stir in the crema or sour cream. Add in the drained pasta and toss to coat.
Divide the pasta into serving bowls and top with some Cotija cheese and cilantro. Serve with a lime slice on the side as garnish.