Step 2: Add the Peppers and Onions
Next, add sliced bell peppers and onions to the same skillet.
Cook them until they become tender and begin to develop a little color. Depending on how thick you cut them, this can take around five to ten minutes.
This is where the kitchen really starts to smell amazing.
The onions become sweeter as they cook, while the peppers add color, texture, and a subtle sweetness to the savory beef.
For extra flavor, add a little garlic, paprika, or Worcestershire sauce.