The filling for this tart is similar to lemon curd, except the orange juice sweetens the flavor.
For a smooth filling, beat the eggs well and mix them thoroughly with the other ingredients. If the eggs aren’t beaten well enough before cooking, small bits of cooked egg white can appear. If necessary, strain the filling to remove these bits.
Any edible flower decorates this tart nicely, but small violas or “Johnny jump-ups” are perfect; they look like tiny pansies. Only non-toxic flowers grown without chemicals are edible. Look for them near the packaged herbs in the produce section of the grocery store.