Well Here it is again
Into food processor add...
2 eggs 1 TBSP mustard of your choice. Wet type. If you use dry cut back to a tsp.
2 TBSP lemon juice
1 tsp salt
Pulse a couple of times to blend.
Turn on and start to slowly add 2 or so cups of oil until very thick.
You can add different stuffs to it for different flavors.
If by some chance it "breaks". pour into bowl and clean processor. Add 1 egg and a touch of water. Pulse a couple of times and then start to add the other back into it.
After you have it very thick keep the machine running for a minute longer to make sure all oil has been emulsified.
Now this is the hard part...let sit on counter at room temp for a couple 3 hours so that the lemon juice can kill off anything bad.
Here is an Alton Brown video to help if needed.....
http://www.youtube.com/watch?v=6bKya9uMHYs