01 -
Heat olive oil in a large cast-iron skillet over medium-high heat. Add chopped onion and cook, stirring occasionally, until softened and translucent, about 8 minutes. Add minced garlic and cook, stirring constantly, until fragrant, about 1 minute.
02 -
Add ground beef to the skillet and cook, stirring with a wooden spoon, until crumbly and no longer pink, about 6 minutes.
03 -
Stir in the beef stock and taco seasoning. Bring to a boil and cook, stirring often, until the sauce has thickened slightly, about 90 seconds. Remove from heat.
04 -
Transfer 2 cups of the beef mixture to a bowl, cool completely for about 30 minutes, cover, and refrigerate for up to 2 days.
05 -
Preheat oven to broil with the rack set about 6 inches from the heat source.
06 -
Stir enchilada sauce and black beans into the remaining seasoned beef in the skillet. Place the tortilla wedges in an even layer on the surface of the beef mixture and gently fold them into the mixture until fully coated and evenly distributed.
07 -
Top the mixture evenly with the shredded cheese. Broil until the cheese is melted and browned in spots, about 4 minutes.
08 -
Remove from the oven and top with cilantro and jalapeño slices. Serve immediately.