Add onion to mixer bowl. Chop for 3 sec/speed 6/MC on. Scrape bowl down.
Add olive oil and cook for 5 min/100°C or 212°F/speed 1/MC off.
Add beef stock concentrate, water, tomato paste, salt and pepper to mixer bowl. Insert simmering basket and put mince meat inside. Cook for 10 min/steaming temperature/speed 3/MC on.
Carefully break up mince meat with a spoon and continue to cook for 10 min/steaming temperature/speed 3/MC on.
Set aside simmering basket with the mince. Add corn flour to the gravy in the bowl. Blend for 10 sec/speed 4/MC on.
Add mince to gravy and combine on speed 3 until mince is broken up and mixed through gravy.
Notes
Low Fodmap: Replace onion with leek (green part only) and use compliant stock concentrate.