Savory Cake

INGREDIENTS:
1 1/2 cup (200 grams) all-purpose white flour
1 teaspoon baking powder
1/4 teaspoon salt
1/4 teaspoon pepper
3 large eggs
1/2 cup (10 cl) milk
1/2 cup (10 cl) vegetable oil
1/2 cup chopped fresh basil
1/2 cup chopped walnuts
1/2 cup grated cheese + cream cheese cut into small pieces
1 cup sliced olives (black and green)
Any fillings of your choice!