Pork Gyros with Tzatziki

Pork

• ½ oz vegetable oil
• 4 oz yellow onions sliced in half moons (¼ in.)
• 8 oz pork tenderloin cut into strips (¼ in.)
• 1 tsp spice mixture for gyros to taste (see Tip)

Tzatziki Sauce

• 1 garlic clove
• 3 ½ oz cucumber peeled, cored and cut into pieces (1 in.)
• 8 oz plain yogurt
  or 8 oz sour cream
• 1 tsp lemon juice
• 1 sprig fresh dill plus extra to garnish
• ¼ tsp salt to taste
• 2 pita breads warmed
  or 2 flatbreads warmed
• 1 lemon in wedges, to garnish