INGREDIENTS
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1 tablespoon vegetable oil
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1 pound ground beef chuck (20% fat)
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1/2 medium onion, chopped
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1/2 green bell pepper, chopped
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2 garlic cloves, grated
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Kosher salt, freshly ground pepper
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1 1/2 teaspoons ground cumin
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1 teaspoon chili powder
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1 cup chicken stock or low-sodium chicken broth
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3 tablespoons unsalted butter
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1/2 medium onion, finely chopped
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1 large poblano chile, chopped
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3 jalapeños, finely chopped
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2 garlic cloves, grated
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2 medium tomatoes, chopped
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Kosher salt
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2 tablespoons all-purpose flour
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1 1/2 cups (or more) milk
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1/2 pound Monterey Jack cheese, grated
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1/2 pound young medium or sharp cheddar cheese, grated
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Pico de Gallo, Guacamole, sour cream, chopped chives, chopped cilantro, and corn chips (for serving)