Finely dice or slice the shallot.
In a bowl, mix oil, vinegar, sugar/sweetener, salt, pepper and parsley.
Add shallots and crush them in the dressing with a fork or the back of a spoon.
Slice the tomatoes and add to the dressing.
Toss and serve.**
*Or any other tomato, just use the type you like best.
**You can eat it straight away, but it's at it's best when you let it sit for about 10 minutes before serving.