Wash the meat, dab dry and cut into pieces. Heat oil in a pan and fry the meat in it at medium heat for 8-10 minutes until golden brown. Season with salt and pepper.
In the meantime, clean, wash and chop the celery and spring onions. Cut plums in half. Remove the meat and keep warm. Add vegetables and plums to the frying fat and fry for 4-5 minutes.
Add stock and cream and cook for 6-8 minutes. Add sauce thickener while stirring, bring to the boil and season with salt and pepper. Add meat and warm up. Sprinkle with coloured pepper as desired and serve garnished with celery green.