Because this recipe is intentionally pared down to three ingredients, most of the magic comes from technique rather than add-ins. A few small tweaks can change the texture and flavor while still honoring the spirit of the original.
For a slightly firmer, more sliceable filling, reduce the water to 1 3/4 cups; for a softer, more pudding-like center, use the full 2 cups and allow extra cooling time. If your crust tends to shrink, lightly prick the bottom of the unbaked crust with a fork and chill it well before filling. To lean into the old-fashioned feel without adding extra ingredients, serve the pie with black coffee or unsweetened tea to balance the sweetness.
Food safety notes: Always bake the pie until the center is mostly set and the top no longer looks wet; underbaking can leave the center too loose to slice cleanly and may affect quality. Cool the pie on the counter only until it reaches room temperature, then cover and refrigerate if not serving within a couple of hours, since the high sugar content and moisture can encourage spoilage at warm room temperatures. Reheat individual slices gently in a low oven if you prefer them warm, and avoid reheating in the glass pie plate over direct stovetop heat to prevent thermal shock and cracking.
