• Place the meat in a large bowl.
• Grate half of the onion into the meat. Chop the remaining half and reserve for topping the burgers.
• Add the Worcestershire sauce, chipotles and adobo, and steak seasoning.
• Add a splash of oil. Mix well then divide into 4 patties.
• Fire up your grill.
• Cook the burgers and toast the buns, as desired.
• Serve the burgers topped with cheese, the tomato sauce, and chopped onion.

For the fire-roasted tomato sauce

• Heat a tablespoon of oil in a medium sauce pan.
• Add the garlic and cook 2-3 minutes.
• Add the sugar and vinegar. Cook for 2 minutes.
• Stir in the tomatoes.
• Season with salt and pepper and let simmer 5-6 minutes.