1 ¼ pounds lean ground beef or lamb
1 (10-ounce) package frozen chopped spinach, thawed and squeezed dry
¼ cup crumbled feta cheese
1 tablespoon minced fresh oregano leaves or 1 teaspoon dried oregano
1 garlic clove, minced
¼ teaspoon ground black pepper
2 tomato slices
4 large or 8 smaller lettuce leaves, for wrapping
Thinly sliced red onion, for garnish
Thinly sliced cucumbers, for garnish
Plain yogurt or sour cream, for garnish
Chopped fresh herbs (parsley, mint, dill, or a combination), for garnish
In a bowl mix the meat, spinach, cheese, oregano, garlic, salt, and pepper with your hands until thoroughly combined. Form the mixture into 4 patties, each about 4 inches across.
Heat a skillet or grill pan over medium-high heat and cook until the burgers are cooked to your desired doneness, about 4 minutes per side for medium.
Serve the burgers with lettuce leaves for wrapping and topped with sliced tomatoes, red onion, cucumber, a dollop of plain yogurt or sour cream, and a sprinkling of fresh herbs.