Whisk eggs and 50 ml water in a large bowl. Mix the flour, 2 teaspoons salt and half of the poppy seeds. Gradually stir into the egg water. Beat vigorously with a wooden spoon until the dough starts to bubble.
Bring plenty of salt water to the boil in a pot. Press the dough in portions into the boiling water using a button slicer or a spaetzle press. Let the buttons simmer for 2-3 minutes until they rise to the surface.
Lift out with a skimmer, drain and place on an oiled baking tray. Process the remaining dough in the same way.
Wash the thyme, shake dry and pluck the leaves. Heat the butter in a large pan, fry the rest of the poppy seeds briefly. Add buttons, lemon peel and thyme. Fry for 3-4 minutes.
Season with salt.