Nacho Burgers

Name: Nacho Burgers
Cook time: 35 min
Total time: 35 min
Cuisine: American
Ingredients: 3 tablespoons red wine vinegar; 1 tablespoon vegetable oil; 1 chipotle chile in adobo, seeded and minced; 3 plum tomatoes, finely diced; 2 tablespoons red onion, finely diced; 3 tablespoons chopped cilantro; Salt; 1 tablespoon unsalted butter; 1 tablespoon all-purpose flour; 1 1/2 cups milk; 1/2 pound Monterey Jack cheese, shredded; 2 tablespoons freshly grated pecorino cheese; Freshly ground pepper; 1 1/2 pounds ground beef chuck; Vegetable oil, for brushing; 4 hamburger buns, split and toasted; Sliced pickled jalapeños and blue corn tortilla chips, for topping