If you're not using pre-ground turkey breast, cut the turkey into cubes and grind it in a food processor. Don't grind it too much; you still want the pieces to be a decent size. Remove to a bowl. Add the peeled garlic, parsley, and roughly chopped fennel bulb to the processor and grind to the same consistency. Remove to the same bowl as the turkey and crack an egg on top, seasoning with salt and pepper. Gently combine with your fingers and form into 4-5 patties. At this point you could freeze any patties you don't want to use.

When the patties are formed, pre-heat your oven to 350 degrees, and place a stainless steel saute pan on a burner on medium high heat. When it gets fairly hot, add some oil. When the oil shimmers, carefully add the turkey burgers one at a time. Cook, undisturbed and covered, for 2-3 minutes until the bottom of the burgers are nicely seared, and then flip to do the other side.

When both sides are seared place the covered pan directly into the oven and cook 5 minutes until the turkey burgers are cooked through. Add your favorite cheese about 1 minute before they're done if you want. Meanwhile toast some sourdough bread and ready your favorite condiments.