Tender bars with a buttery crust, tart rhubarb, and silky custard, perfect for spring gatherings and comforting desserts.
Chilling the crust mixture before pressing helps it hold together better but is optional. Use room-temperature eggs for a silky custard. Avoid overbaking to prevent dry custard; the center should jiggle slightly when done. Frozen rhubarb can be used if thawed and drained well. For gluten-free, substitute flours as noted. Vegan adaptations include flax eggs, coconut milk, and vegan butter.
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