BUSHS® Fully Loaded Queso

Name: BUSH’S® Fully Loaded Queso
Ingredients: 2 tablespoons unsalted butter; 1 small white onion, minced (1 cup); 2 large garlic cloves, minced; 2 large jalapeños, minced (½ cup); 2 tablespoons all-purpose flour; 12 ounces shredded American cheese (4 ¾ cups); 4 ounces shredded Monterey jack cheese (1 ½ cups); 1 1/2 cups whole milk; 2 small tomatoes, diced (1 ½ cups, 8 ounces); ⅓ cup sour cream; Chopped fresh cilantro leaves, for garnish; Tortilla chips, for serving