Ingredients

• 2 pounds ground chuck, 80 percent to 85 percent lean
• 1 teaspoon kosher salt
• 1 teaspoon freshly ground black pepper
• 8 thin slices Chihuahua or provolone
• 4 good-quality hamburger buns, toasted
• Green Chili Sauce, recipe follows
• Romaine lettuce leaves, optional
• 4 thick slices beefsteak tomatoes, optional
• Pickled jalapenos, optional

Directions

Green Chile Sauce:

• 2 poblano chiles, grilled, peeled, seeded, and chopped
• 1 medium white onion, grilled and chopped
• 1 to 2 cloves garlic, chopped
• 2 tablespoons chopped fresh epazote, or fresh oregano leaves
• 1/4 cup cold water
• 1 tablespoon honey
• 1/4 teaspoon kosher salt
• 1/4 teaspoon freshly ground black pepper