Heat just half of the oil in a non-stick skillet over medium heat. Add the artichokes and cook until they start to brown in places, about 5-6 minutes.

Add spinach and some salt and pepper to the skillet and stir until spinach wilts, about 2 minutes.

Transfer spinach artichoke mixture to a bowl and wipe the skillet clean.

Add the spinach artichoke mixture and the cheese to a slice of bread and top with other slice of bread.

Heat remaining oil in the skillet over medium heat. Add sandwich and cook until golden brown, 2-3 minutes per side.

Cut sandwich in half and serve.