Add the Greek yogurt, lime juice, grated garlic, and salt to a small bowl.
Stir until smooth and well combined.
Taste and adjust the lime juice or salt as needed.
For a thinner crema, stir in water 1 teaspoon at a time until you reach your preferred consistency.
Use immediately or refrigerate until ready to serve.
Notes
For the smoothest garlic flavor, grate the garlic with a microplane rather than finely chopping it.For a drizzleable sauce, thin the crema with a small amount of water.Store covered in the refrigerator for up to 3 days.