Dissolve the yeast in the water.
Add sugar, salt, and eggs and whisk well.
Mix in the ham, cheese, zucchini, and chives.
Add both types of flour to the bowl and stir everything well with a large spoon. The dough should be cohesive but can be a bit wet.
Let the dough rise for an hour at room temperature.
Preheat the oven to 200 degrees Celsius (392 degrees Fahrenheit).
Use a spoon to shape the buns and place them on a baking sheet with baking paper.
Bake for 20 minutes until they are golden and nice.