1. Grab your bowl and a whisk
2. Add about 2 tablespoons of dijon mustard to the bowl
3. Add about 4 ounces of vinegar or whichever acid you choose
4. Whisk these together
5. Slowly add your oil (about 8 to 12 ounces) in a thin constant stream while vigorously whisking to create an emulsion
6. Add salt and pepper and taste for seasoning and balance
7. You can always add more oil if you think it is too acidic
Done!