Start by cutting your steak into 1-inch cubes.
Then cut your red onion and bell pepper into about 1-inch pieces.
In a small bowl, mix together the minced garlic, soy sauce, olive oil, red wine vinegar, black pepper, and grated ginger. Mix well.
Pour the marinade into a large plastic bag, and place the steak, red onion, and bell pepper in it. Seal and then place in the refrigerator to marinate overnight (or at least a few hours)
Then thread the steak, red onions, and bell pepper through the skewers.
Place in your Air Fryer the temperature I used was 350 degrees for 5 minutes, then flip and air fry another 5 minutes. Make sure your steak is cooked, before you plate.
Plate, serve, and enjoy!