The Authentic Greek Gyro - “A Greek Grill Party” - cooking recipe

Ingredients

2 lbs lamb (use lean, boneless lamb meat cut in 1 in cubes)
1/3 cup olive oil
1/2 cup lemon juice
2 garlic cloves (peeled and quartered)
1 teaspoon fresh thyme leave (chopped)
1 teaspoon fresh oregano (chopped)
ground black pepper
2 large onions (use red onion cut in thinly sliced rings)
24 small romaine lettuce leaves (washed and dried)
12 large pita bread rounds
3 tomatoes (ripe & sliced in thin wedges)
2 cups yoghurt (plain per prep instruction #3 or thick Greek style)
1 garlic clove (peeled & minced)
1 teaspoon oregano (fresh, chopped)
1 tablespoon lemon juice
1 teaspoon olive oil
salt and black pepper (to taste)

Preparation

The morning before an afternoon or evening BBQ, make marinade by combining oil, lemon juice, garlic cloves, herbs & pepper in a med bowl. Set aside about 1/4 cup of the marinade to mix w/the onions. Place cubed lamb in bowl w/remaining marinade & toss to coat well. Refrigerate lamb & marinade reserved for onions.
The morning of the BBQ, place onions in small bowl & toss w/reserved marinade. Cover w/plastic wrap, refrigerate several hrs & stir to mix well several times.
Make yoghurt sauce by lining a med bowl w/cheesecloth & spooning in the yoghurt. Tie up edges of cheesecloth w/string to form a pouch. Suspend over a bowl or place in a colander over a bowl & let stand to drain several hours. Moisture will drip from the yoghurt & give it a thick consistency. (Eliminate this step if able to get real thick Greek yoghurt.).
Mix yoghurt w/minced garlic, herbs, lemon juice, oil, salt & pepper. Cover & chill.
When ready to BBQ, stack pita bread in 2 piles of 6 & wrap each pile in foil (dull side out).
Heat coals or gas grill. Remove meat from marinade & reserve marinade for basting. (Discard any large garlic pieces.) Thread lamb onto greased skewers & grill over greased grill about 4 in from hot coals. Cook (turning & basting often) about 10 min or till lamb is brown on the outside, but still pink inside.
Warm pita rounds over barbecue.
Before serving, lift onions from the marinade w/a slotted spoon & place in a serving bowl. Cut whole tomatoes into thin wedges & place on a serving plate w/the lettuce leaves. Set out yoghurt sauce & lots of napkins (You'll need them!).
To serve, cut each warmed pita round in half & separate to form 2 pockets. Each person fills a warmed pita picket with some of the grilled lamb cubes, lettuce, tomatoes & onions, then tops with a spoonful of the sauce.