Using a box grater, grate your onion over a larger mixing bowl
Add the rest of the ingredients to the bowl and mix with hands until combined, the burgers should be wet, but if they feel too moist add a little more panko.
Place wax paper or parchment paper on a cookie sheet and form the burgers (see note below)
Cook on the BBQ or in a cast iron pan to your desired temperature
Top with your favorite burger condiments and enjoy!
Notes
If I can find a pork/beef mix or a meatloaf mix I often use that to add a little extra fat and some variation.Use a box grater to grate your onion and do it right over the bowl. You want all the juice.When forming the burgers, if you put a little dimple in the top with your thumb, it will prevent them from shrinking.These burgers freeze really well, place the paper lined cookie sheet in the freezer for a couple of hours and then place them in a Ziploc bag with paper between. Freezing them on a flat surface first makes them easier to pull apart later.These burgers are great plain but I prefer them covered in cheese and bacon!