Whisk together the oil, 2 TBS lemon juice, crushed garlic, 1 tsp salt and pepper, marjoram, thyme, rosemary, and oregano in a bowl, and pour into a resealable plastic bag. Add the cubed lamb, coat with the marinade, squeeze out excess air, and seal the bag. Marinate in the refrigerator 12 to 24 hours. Once the meat has finished marinating, remove from the refrigerator, and allow it to stand at room temperature for 1 hour.