Take a 1/2 cup size measuring cup or however large you want your burgers and line it with clear plastic wrap.
Flatten burger mixture into measuring cup and fill to top of cup
Lift burger from cup with plastic wrap.
Fold sides of the plastic wrap completely covering the veggie burger.
Pat gently down on the burger to form a burger
Once you are happy with how it looks close all ends of the plastic wrap around the burger
This is how it should look.
Here's how they all look. Now place them in the freezer on a flat plate for a few hours then place in a heavy zip lock freezer bag and label your burgers. Now you can pop one out whenever you are hungry.
Congratulations you have just graduated Burger Making 101.