Green pancakes with ham and cheese

Pancake batter

• 250 g plain flour
• 500 g milk
• 15 g olive oil plus extra for frying
• 2 eggs
• 1 pinch fine salt
• 200 g frozen spinach leaves thawed and squeezed

Filling

• 200 g medium-hard cheese cut into pieces (e. g. Cheddar)
• 180 g cooked ham in slices, cut into pieces (3 cm)
• 2 pinches black pepper, freshly ground