Use rolled oats and a firm ripe pear
Choose pears that yield gently near the stem but are still firm enough to dice. Very hard pears may remain firm in the center, and very soft pears can disappear into the oats. Wash and dry them before cutting. Weigh the prepared fruit after coring so the amount of juicy fruit is consistent.
Spread the fruit through the oats
Most of the pear is cut into small cubes and folded into the mixture, making fruit available throughout each portion. Reserve the smaller measured quantity for thin slices across the top. The skin can stay on both cuts; it provides a clear edge without requiring a separate decorative ingredient.
Whisk milk and eggs thoroughly before combining them with the oats so there are no strings of egg white. Melted butter should be warm rather than piping hot when it is mixed in. Cardamom is deliberately restrained: a small measured amount carries through the milk without obscuring the pear. Maple syrup sweetens the mixture rather than being added as a finishing drizzle.
Check the center and let it settle
Use a shallow square dish so the center can set while the top becomes lightly golden. The surface should no longer look like pooled milk when the bake is finished. Because this is a mixed casserole, this recipe uses 165 F (74 C) in the center as its thermometer endpoint rather than relying only on browning.
Rest for ten minutes before dividing the oatmeal. The oats continue absorbing some liquid, and the portions are easier to lift without being dry. Serve as it is, or add a separate splash of milk at the table if desired. Refrigerate spare portions promptly in shallow containers for a breakfast that can be reheated thoroughly on another morning.
