Cut the bell pepper into strips approx. 5 mm wide.
Heat the oil in a pan and fry the prawns on both sides for about 2 minutes until they are pink, then remove and season with salt.
Fry the pepper strips in the same pan for about 3 minutes while stirring. Add the curry paste and coconut milk and bring to the boil. Reduce the heat, add the beef and simmer for about 2 minutes. Season to taste with salt. Finally, put the prawns back in the pan and just let them get hot.
This goes well with fragrant rice.
Tip: Instead of the prawns, you can also use fish, e.g., Cod or Pangasius.