Gyro-style Pork Sandwich

Ingredients

• olive oil
  ¼ cup
• prepared mustard
  1 tbsp
• lemon juice
  ½ cup
• garlic

  minced
  2 cloves
• dried oregano
  1 tsp
• boneless pork loin

  cut crosswise into thin slices, then into 5 x ½ inch strips
  1 lb
• plain low-fat yogurt
  1 cup
• cucumber

  peeled and chopped
  1 unit
• garlic

  crushed
  ½ tsp
• dill
  ½ tsp
• pita loaves

  halved
  2 unit
• red onion

  peeled and thinly sliced
  1 small