Greek Burgers with Tzatziki Sauce

The burger bonanza continues (I can't get enough of those buttery brioche buns). I like Greek flavors, and what better way to use them than in/on a burger? This time I incorporated the cheese into the patty. This is a comparatively healthy burger. (Half) whole wheat bun, lean beef, tomato, spinach, onion, and Tzatziki sauce (which is non-fat yogurt and cucumber). So many vegetables and yet so good.

I sliced my tomato way too thick. I could barely get my hands around that burger (my hands are awkwardly small), let alone open my minuscule mouth wide enough to take a bite. I kind of came at it from the side. Safe yourself the mess and slice the tomatoes thin. I get carried away with ripe juicy red tomatoes. I just noticed that besides the desserts, practically every recipe I've posted lately contains tomatoes. As it should be.

INGREDIENTS
Burgers:
1/2 lb. lean ground beef
handful of feta (just depends how much you want)
dash or two of dried oregano
dash or two of salt and pepper

Toppings:
baby spinach
red onion, thinly sliced
tzatziki sauce (recipe below)
tomato, sliced (not too thick or your burger will be too tall to bite)
2 Light brioche hamburger buns or whole wheat pitas

Tzatziki Sauce*:
8 oz. plain Greek yogurt (you need Greek style so that your sauce is thick enough, the higher the fat content the richer your sauce will be)
1/2 cucumber shredded, water squeezed out
1/2 lemon, juiced
salt and freshly ground black pepper, to taste
1 clove garlic, minced or grated
1 Tbsp. extra virgin olive oil
several dashes of dried dill, to taste

*This recipe makes much more than you will need for just two burgers, probably enough for 8 or 10.

DIRECTIONS
1. In a bowl medium bowl combine the ground beef, feta, oregano, salt and pepper. Using your hands gently incorporate the ingredients into the meat. Be careful not to overwork it. Form into two even (or odd) sized patties.

2. Preheat indoor grill pan or outdoor grill to high heat. Grill each patty until it's done (according to how red you want it). Place the patty on a hamburger bun and top with spinach, red onion, tzatziki sauce, and tomato (not necessarily in that order). Take a bite.

3. To make the tzatziki sauce, stir to combine the yogurt, cucumber, garlic, and lemon in a small bowl. Season to taste with dill, salt, and pepper. Refrigerate until ready to use.

Makes 2 burgers.

(Adapted from Foodo del Mundo)