Greek Burgers

• 6 wheat pita pocket (whole)
• 1 size tomato (plum)
• 1 onion (red)
• 450 gr extra beef (lean ground)
• 30 ml lemon juice (fresh)
• 3 gr flat-leaf parsley
• 2 gr oregano leaves (dried)
• 1 gr cumin (ground)
• 1 gr pepper (ground)
• some garlic