Activate the yeast In a small bowl, combine warm water, sugar, and yeast. Let sit 5–10 minutes until foamy.
Make the dough In a large bowl, mix flour, salt, and black pepper. Add the yeast mixture, olive oil, and eggs. Mix until a soft dough forms.
Knead Knead for 8–10 minutes until smooth and elastic.
First rise (without filling) Place dough in an oiled bowl, cover, and let rise 1–2 hours until doubled.
Incorporate the filling Gently punch down the risen dough. Flatten slightly and sprinkle in the diced salami, mortadella, and cheeses. Fold and knead just enough to distribute the filling evenly without deflating the dough too much.
Shape Roll into a long log and form into a ring. Place in a greased bundt or round pan.
Add eggs (optional) Nestle whole eggs into the dough and secure with strips of dough in a cross.
Second rise Cover and let rise 45–60 minutes until puffy.
Bake Bake at 375°F (190°C) for 40–50 minutes, until golden brown. Tent with foil if browning too fast.