The thing about tri tips is that they are so big that you can have all kinds of rareness in the steak at the same time. So there is a part which is perfect for everybody. Normally the ends are well done and the more you get to the middle the more rare the steak becomes.
Anyway here is a recipe how to cook it on a gas bbq.
- get a 1.5 - 1.8 lbs tri-tip steak
- marinate it for 12 - 24h in a marinade of your choice
- preheat the bbq as high as possible
- drop the steak on the bbq on very high temperature and let the lid open
- wait 5 minutes
- turn the steak and let the lid open for another 5 minutes
- reduce the heat to medium low and turn the steak
- close the lid for the next 10 minutes
- flip the steak
- close the lid and wait another 10 minutes
- now its done.
enjoy.