Mix the vinegar, garlic, shallots, and sugar together in the bowl, and proceed to whisk it all together, to dissolve the sugar.
Continue whisking steadily as you start to slowly drizzle in the oil, increasing the speed of your whisking as you go.
Once you’ve managed to incorporate it all, add in salt and pepper to season the mixture, and give it all a final, thorough whisking.
Taste it to make sure it has reached the perfect balance, and add in more seasonings if required.
Your vinaigrette is now ready. Drizzle it over salads to give them an extra kick, or serve it with meat, pasta, or vegetable dishes. When not in use, store in a glass jar with a tight lid.