Gotta love the burger. I have developed a decent consistency in my burgers, with a little variation of the available ingredients.
Ground hamburger (about 0.5 - 0.75 lb per person)
Garlic, chopped
Salt and Pepper, or better yet, Montreal Steak Seasoning
1 egg per every 2-3 burgers
Combine all the ingredients in a bowl, and mix until blended with a spoon or your hands. Don't press the meat too much - the idea is to keep everything fluffy. Add whatever additional ingredients you want to flavor the burger with. Some of the things I toss in include chorizo or andouille sausage, good mushrooms (shitake, porchini, or morel), roasted garlic, or in this case, lots of chunked feta.
Form the burgers into nice big patties, and again don't squeeze the meat too much, just enough to hold everything together. Push the center of the buger in with your finger, this will keep the meat from ballooning when cooking. Toss on a hot grill, and (and this is the secret ingredient) douse liberally with Worcestershire sauce. Cook until nicely crisp on one side, then flip, add more Worcestershire sauce, and cook until done. Add some sliced blue cheese towards the end if you like, but with the feta-burger it's not necessary. Top with carmelized onions or sauteed spinach or watercress, and all the other toppings.
