Butter and flour a 9 inch pie dish. In a large mixing bowl, cream eggs and sugar together until light and fluffy. Add melted butter, milk and vanilla and whisk until smooth. Add baking powder and salt to the flour and sift into the bowl, whisking to combine until very smooth.
Cut each pear in half again, then into 3 large pieces at a 45 degree angle. Pour batter into prepared dish, then lay in pears evenly. Bake 30-40 min at 400°F until top is brown.