1Make caramelized onions: Cook diced onions over medium-high heat until water evaporates and they brown. Deglaze with beef bone broth, stir and boil until liquid is reduced. Repeat until all broth is reduced. Add soy sauce for extra flavor.
2In the same pan, add ground beef, seasoning blend, diced tomatoes, and half of the caramelized onions. Mix well.
3Add cheddar cheese and mix. Refrigerate for 20 minutes to thicken.
4Prepare the low-calorie burger sauce by adding all ingredients into a bowl and mixing until smooth.
5Assemble the burritos: Spread the burger sauce on a tortilla, add the meat mixture, and roll it up tightly. Repeat for all tortillas.