Whisk the fajita seasonings in a bowl together. Set aside.
Looking for a new recipe to spice up your burger? Try this delicious fusion fajita burger topped with grilled onions, peppers, manchego cheese, and homemade guacamole.
Prep your charcoal in your half-time chimney starter. and allow the coals to get covered in a thin layer of ash before carefully transferring to your Char-Broil Kettlemen Grill for offset heat with clean oiled grates (or if using the Char-Broil Gas to Coal Grill, allow the coals to get a thin layer of ash before proceeding). Allow the grates to heat up.
Meanwhile, mix 2 tablespoons of the fajita seasoning into the ground beef. Form the ground beef into 6 patties, make a dimple in the center of each with your thumb, and season the outsides with salt and pepper.
Toss the onion and peppers in olive oil and sprinkle with salt. Arrange the veggies in a grill basket and place on the cooler side of the grill to cook, tossing occasionally until veggies are charred and softened, 7 to 10 minutes.
Arrange the patties on the cool side of the grill with lid closed, cooking to desired temperature, flipping once halfway through for even cooking.
Toast the buns.
With a minute to go, arrange the manchego cheese over the burgers and close the lid to allow the cheese to melt. Remove from grill and allow to rest.
Arrange the buns with lettuce and tomato if desired. Top with a burger, a dollop of guacamole and a healthy pile of fresh grilled onions and peppers. Top off with the buns, serve and enjoy your Char Grilled Fajita Burgers!