In large mixing bowl, place all ingredients except pitas, cucumber, and tzatziki, and combine until mixed evenly. Form into 16 mini patties. Place in fridge and chill for 20 minutes.
In nonstick or lightly oiled pan, over medium-high heat, cook on each side for 2 1/2 minutes or until internal temperature reaches 160 F.
Serve as desired, but these burgers are fun to serve on a toothpick or small skewer with a cucumber slice and pita bread in the form of a burger bite. Serve on a platter with a bowl of tzatziki and lemon wedges.