No tomato sauce. Sliced onions, sliced red and green bell peppers, diced smoked chicken breast, and grated Gruyère cheese are toppings enough.
Sweat the vegetables lightly in olive oil before spreading them on the pizza dough. Dice up the cooked chicken and scatter the pieces on top of the vegetables. Sprinkle on a good amount of grated cheese (whatever you like). Optionally, top with a few black olives. Bake on a pizza or bread stone in a very hot oven. Serve with more olive oil or hot pizza oil at the table.