"The first time I cooked King Ranch casserole, I wasn’t sure if I’d ever had it before. While it’s a classic Texan standby, I’d been gone from the state for so long that some things had faded from my…..."
INGREDIENTS
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4 tablespoons unsalted butter
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1/2 medium yellow onion, diced
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2 jalapeños, seeded and diced
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6 cloves garlic, minced
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1 cup (about 6) diced button mushrooms
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1 teaspoon kosher salt
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1 teaspoon ground cumin
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1 teaspoon chili powder
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1 teaspoon dried oregano
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1/2 cup chopped cilantro
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2 heaping tablespoons all-purpose flour
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2 cups whole milk
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1 (10-ounce) can tomatoes with green chiles (such as Ro-tel), with its juices
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1 cup sour cream, plus more for serving
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3 cups cooked or 2 (15-ounce) cans pinto beans, drained and rinsed
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10 corn tortillas
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3 cups shredded Colby-Jack cheese