Lemon or Lime tart — not for the faint of heart

I mean this literally: this tart is loaded with butter and eggs, so if your cholesterol is already high, beware! As an occasion indulgence it is well worth it. The crust is quick and easy to make, and it is crumbly but still holds its shape. The filling has a strong, smooth, and invigorating citrus flavor, with great texture. Active preparation time is only about 1 hour, and it can be made ahead of time with no last minute preparations, which makes it ideal for dinner parties — via Instructables