Add olive oil to the mason jar. Squeeze the juice of a whole lemon, then add to mason jar. Add all remaining ingredients.
Put the lid on the mason jar tightly and then shake! Enjoy immediately or store in the fridge for up to 4 days.
If you don't have a mason jar:
Add all ingredients to a medium size bowl that has a lid. Mix ingredients with a whisk until combined and cover with a lid.
Notes
Tips on squeezing the lemon:
Squeeze in a separate container. It makes it easier to remove all the seeds before adding to the olive oil.
Or you can put a small strainer (similar to this) on top of the mason jar. Then squeeze the lemon over it so it catches the seeds.
This recipe makes ~13 tablespoons. Give it a good shake after taking it out of the fridge before pouring on your salad. Nutritional values are approximate and based on products used.