Savory Waffles with Cheese and Ham

Ingredients:

250 g flour
1 packet baking powder
3 eggs
200 ml milk
100 ml vegetable oil (or melted butter for more flavor)
150 g grated cheese (Emmental, Comté or Cheddar)
100 g diced ham or bacon (you can also use diced bacon)
Salt and pepper
Chives or chopped parsley for garnish (optional)
Preparation:

Preparing the dough: