Preheat oven to 325°F (165°C).

In a bowl, whisk eggs, sugar, vanilla, and salt until smooth.

Warm milk gently (optional), then slowly mix into egg mixture.

Pour into a baking dish and place in a larger pan filled halfway with hot water.

Bake uncovered for 40 minutes or until set but slightly jiggly in the center.

Cool, chill, and serve.