Step 1Soak the skewers in water for 10 minutes, to prevent burning.
Step 2Meanwhile, mix garlic, lemon juice and oregano in a small bowl. Place the beef cubes in a medium non-metallic bowl with three quarters of the lemon marinade. Set aside to marinate.
Step 3Combine remaining lemon marinade with 1 tablespoon of olive oil to make a dressing for the salad. Toss the lettuce with the cucumber, tomato, feta and dressing; set aside.
Step 4Spray a large non-stick frying pan or barbecue hotplate with olive oil; set over medium-high heat. Thread beef onto skewers and cook, turning, for 5 minutes, for medium, or until the meat is done to your liking.
Step 5Serve beef souvlaki with Greek salad and pita breads.