Preheat oven to 300°F (150°C). Line a baking sheet with parchment paper.
Separate eggs carefully. No yolk in the whites.
In a clean bowl, whip egg whites + cream of tartar until stiff peaks form.
In another bowl, mix yolks, yogurt, and salt until smooth.
Gently fold yolk mixture into whites. Do not overmix.
Spoon into 6 even rounds on parchment.
Bake 20–25 minutes until lightly golden.
Cool before removing.
Store in fridge up to 3 days. Toast lightly before serving.
You can use one of these:
Cream cheese
Greek Yogurt
Cottage Cheese - Needs to be blended very smooth