Mix the yeast crumbled with a little water and sugar. Add 1 tablespoon flour and let rest for about 15 minutes.
Add the rest of the water, oil, flour, thyme and salt and knead well.
Let rise in a warm place for 40 minutes. (Knead in the bacon for ham snails)
Knead the dough again and divide into 8-12 parts and roll into long, finger-thick sausages. Then shape snails from it.
Let rise for another 20 minutes on a tray.
Mix the egg yolks and spread them over the snails. Sprinkle with cheese. and bake in the oven at 200 ° top and bottom heat for 15-20 minutes until golden brown.