Guacamole-Stuffed Fajita Burgers

Make the Guacamole
1 Using the Casabella 4 'n 1 Avocado Tool, open the avocados, remove the seeds and place in a glass bowl.
2 Juice the lime over the avocados, then mash using the tool.
3 Add the taco seasoning and kosher salt, mashing until the mixture is more smooth.
4 When the guacamole is at its desired consistency, transfer to the Casabella’s Guac-Lock, and seal the lid. Set aside.
Cook the Fajita Veggies
1 Using a mandoline or a very sharp knife, cut the onions and green bell pepper into thin slivers. 
2 Heat the olive oil in a nonstick pan over high heat.
3 When the oil is shimmering, add the onions and pepper.
4 Saute for 10-15 minutes, or until the onions and pepper have browned and are softened and flavorful.
5 Remove from the heat, and transfer to a bowl.
Make the Burgers
1 As the veggies cook, form the burgers.
2 Place the ground beef in a glass bowl, using your fingers to mix in the taco seasoning and salt.
3 When the seasonings are mixed into the burger meat, divide the meat into three even rounds.
4 Half each round of meat. Using your hands and fingers, flatten and shape the meat into six patties. Each burger will have a top half and a bottom half, so you will have a total of SIX patties, even though this only makes three burgers.
5 Dollop 1 ½ tablespoons of guacamole onto the middle of THREE burger patties.
6 Carefully, place another burger patty on top of the one with guacamole, pinching and sealing the meat together on the edges and working lightly so the guacamole does not spill.
7 Repeat this process and seal the other two burgers.
8 Heat a nonstick skillet over high heat, and add coconut oil. You may use the same skillet you used to cook the veggies.
9 When the coconut oil has melted, sprinkle the burgers with additional taco seasoning and place in the pan.
10 Sear on the first side for 4-5 minutes, or until very browned, then flip the burgers and sear for another 4-5 minutes.
11 While the burgers cook, begin preparing the buns. Smear guacamole on the top and bottom of the toasted bun, and add a layer of fajita veggies on the bottom half.
12 When the burgers are done, remove from the heat, and place on top of the bottom bun. Top with additional fajita veggies and the top bun.
13 Enjoy immediately!