Sopa de Queso Estilo Sonora (Sonoran Cheese Soup)

Sopa de Queso Estilo Sonora (Sonoran Cheese Soup)

The rich, fertile soil of Sonora, in northern Mexico, makes for happy cows that produce some of the country’s best milk and cheese. This mildly spicy soup, a chowder of sorts made with milk, chiles, tomatoes, potatoes, and cheese, shows off that wealth of good dairy. The cheese of choice, queso Chihuahua, is a melting cheese that is a mainstay of the region. But Oaxaca, asadero. mozzarella, or even Monterey Jack can step in as dignified substitutes. Any type of potato will work.

Sopa de Queso Estilo Sonora (Sonoran Cheese Soup)3 tablespoons canola or safflower oil
1 to 1 1/4pounds potatoes (4 medium), peeled and diced (about 3 cups)
1 1/2 cups chopped white onions
1 cup diced green bell peppers
1 ripe medium tomato, cored and diced
4 poblano chiles (about 1 pound), roasted, peeled, seeded, and cut into strips
3/4 teaspoon kosher or sea salt or to taste
4 cups chicken broth, homemade or store-bought
2 cups milk
8 ounces white melting cheese, preferably queso Chihuahua, Oaxaca, asadero. mozzarella, or Monterey Jack (see headnote), diced (about 1 1/2 cups loosely packed)

Heat the oil in a large heavy pot over medium heat. Add the potatoes and onions and cook, stirring often, until the onions are soft and translucent, 4 to 5 minutes. Add the bell pepper, tomato, poblano chiles, and salt and cook until the vegetables are softened, 4 to 5 minutes. Add the broth, bring to a simmer, and cook for 10 minutes, or until the potatoes are tender and the broth has thickened a bit. Taste and adjust the salt. Reduce the heat to medium-low and slowly add the milk, then bring to a gentle simmer. Gradually add the cheese and stir until it is completely melted. Taste again for salt. Top with a little scallion for color, if desired.

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