Cook the meat mixture

• Brown the lean ground beef in a frying pan, breaking it up as it cooks.
• Add the sliced bell pepper and onion if using and cook until softened.
• Stir in the au jus seasoning and a splash of water, then simmer until the liquid is absorbed.

Fill the tortillas

• Lay a low carb tortilla flat and add a portion of the meat mixture.
• Place a light string cheese stick on top, tuck in the sides and roll tightly.

Air fry the roll-ups

• Mist the roll-ups with oil and place them in the air fryer basket.
• Air fry at 380 °F (190 °C) for 3–4 min per side until golden and crispy.

Alternative: shallow fry

• Heat a little oil in a skillet over medium heat.
• Shallow fry the roll-ups, turning, until golden on all sides.

Serve

• Serve the roll-ups with air fried fries and a green vegetable.