The steak needs to seal first on a hot bbq then slow cooked to remain tender. The best way to judge your steak is to touch it and the softer the steak is the less it is cooked, if it is firm to touch then it is well done. Try this: Using your pointer finger, touch the middle of your forehead, ths feel represents 'well done', now touch your chin, this represents 'medium', now touch the middle of your cheeks, this represents 'rare' ....... Remember these tips are a guide only.