Greek Marinated Steak Sandwich

this is a quick & easy recipe with lots of flavor, summer feeling and aroma from the greek islands... combine that with a good quality steak and you can't go wrong with this sandwich... Ideal for the summer.... grill it in your BBQ...
Alissa

Greek Marinated Steak Sandwich
2 rounds pita bread
1 lb sirloin

Marinade
1/2 c red wine
2 tbsp olive oil
2 sprigs fresh oregano
2 cloves garlic -- crushed
salt and pepper

Tzaziki
1/2 c sour cream
1/2 c yogurt
1/4 c peeled, seeded, and chopped cucumber
1/4 c chopped red onion
salt and pepper

Mix marinade ingredients together in a zippered plastic bag and marinate steak 24 hours in the refrigerator, turning occasionally.

Mix together tzaziki ingredients.

Cook the steak over a hot grill for 2 to 3 minutes per side depending on thickness of steak. Warm pita in a microwave, wrapped in a paper towel, for 15 seconds. Slice steak very thin across the grain and stuff into pita along with tomato, onion, lettuce, and tzaziki.