Ingredients

• ½ small white onion, finely chopped
• 1 jalapeno pepper, seeded and finely chopped
• 2 limes
• Salt
• 5 plump tomatillo, hulls removed, seeded and chopped
• A small handful of cilantro leaves, finely chopped
• 2 Hass avocados, halved and scooped from skin
• Hot sauce of choice, about 1 teaspoon
• 1 ½ pounds ground beef 80%
• Black pepper
• 1 teaspoon EACH: ground cumin, coriander, oregano, garlic, smoked sweet paprika/pimenton,
• A pinch of ground cinnamon or smoked cinnamon
• About ½ cup crushed thin corn tortillas 
• Non-aerosol cooking spray
• 4 thick deli slices each Swiss and Pepper Jack 
• 4 sesame seed buns 
• 2 cups chopped iceberg lettuce

Directions

Chop and combine onion, jalapeno and juice of 1 lime with salt and let stand for a few minutes.

Heat cast-iron skillet over medium-high heat. 

Chop tomatillos and cilantro and add to onions and jalapeno, combine.

Mash avocados and add juice of 1 lime, hot sauce and salt to taste.

In a mixing bowl combine beef, salt and pepper and dry spices with crushed tortilla chips.  Score meat into 4 portions and form into thin patties.

Spray cast iron skillet with oil and cook patties for 8 minutes, turning occasionally and topping with 2 slices of cheese in the last minute or so to melt.

Build burgers: bun bottom, salsa, lettuce, patty, avocado mash, bun top.