greek cheese burgers with tzatziki

Ingredients

• TZATZIKI:
• - make this 2 hours before you want to use it. can be made the day before:
• 3 cups greek yogurt
• 2 medium seeded cucumbers,peeled and sliced(can use seedless cukes)
• 3 tablespoons lemon juice
• 1 clove garlic
• 1 tablespoon chopped fresh dill
• 1 tablespoon kosher salt
• 1/4 teaspoon black pepper
• CHEESE BURGERS:
• 1 pound lean ground beef
• 1/3 cup athenos feta cheese or your favorite brand
• 1/2 teaspoon oregano
• 2 cloves minced garlic
• 1/4 teaspoon black pepper
• 1 large egg