Step 2: Brush exterior edge with egg
Step 3: Fold dough over (in half to create a half-moon)
Step 4: With the fork, press to seal the half-moon edge*.
*(At this point you can put the turnovers into a container to freeze. If you do, I would suggest layering cling-film or paper in between so they don't stick together, and can be unfrozen in pieces, as needed).
Bake until light golden color. Serve hot! Another crowd-pleaser than can be prepared in advance ;)
If your guests are not into tuna, you can always to a meat bolognese filling! (just remember to to make the mix too runny)