The first thing you want to do is hand mix the lamb and beef in a large bowl.
This particular batch weighted 2412-Grams. I have a 5-Quart Kitchen aid, and it's the best tool for this job. You could do it by hand, but the results won't be as good as working with a mixer. I mixer can comfortably handle 1200g. Make sure to use the Dough hook.
Why use a dough Hook instead of a Paddle?
• No Fat Smearing.Less Friction and less heat with Hook.
• Mixer and handle copious amounts.
• Produces better texture.
• No fat wrapping (fat will wrap around paddle).
• The paddle will break up the fat and may liquify because of generated heat.
• Better consistency.
The meat weighed in at 2412g/2 = 1206-Grams. Weigh out the spices and herbs and divide them by 2. Working in batches start mixer out on low and run for a minute or so. The goal is to make a lump of sticky meat. It's all about protein extraction, binding, and emulsification. This is similar to HOT-DOG making.
Run the machine on low and, if necessary, scrape down the bowl. Using a Teaspoon as your guide toss in the spice mixture. Now, this is very important, and I cannot tell you how much ICE-Water you will need. The meat will appear dry, so start with 1/4 cup of ICE-Water and occasionally add while mixing. Everything needs to form a paste, appear to be wet and sticky. This should take about 7-10 Minutes. Now do the other half.
You will need 600-Grams for the Half Sheets and 1200-Grams for full sheets.
Spray down the sheet-pan with non-stick spray. Dump 1200-Grams out on the sheet pan and using your hands spread out. You may have to use some Ice-Water to help with spreading out the meat. You can also use a large metal spatula to help. It helps to keep your hands wet.
After spreading out the meat, place parchment paper on top. Using a rolling pin or something similar smooth out. The thickness should be around 3/16" or 5-MM. Place another sheet pan on top and press down. Note: You might be tempted to line a sheet pan with parchment paper to spread out meat, but it's more work, and it serves no purpose.
To Vac seal, you will need a FoodSaver Expandable Bag.
For those of you that don't have a vessel large enough to cook in see option "B" below.
Use a 1/2 sheet pan. It will take 600-Grams of Gyro meat.
Make sure when you place in the cooking vessel, you leave enough room for water circulation. I used cookie racks and muffin tins.
Sous-Vid-Process at 145°F (62.8°C) for 30-45-Minutes to pasteurize. Even if the thickness was 10mm, it would still be pasteurized at 30-Minutes. At the thickest part, it only measured 5mm. I never go beyond 45-Minutes!!! The secret is to process with a minimum amount of time. Less time means less fat and moisture loss.
The decision to use a sheet pans came to me after trying other methods and observing their shortcomings. Loaf-Pans give up to much Fat and Moisture. How about large casings or large cylinder Gyros? They're great if you want to slice and sear to develop more flavor. Having done that, this method is better IMO. I've seen people make the large cylinders but only sear the outside and serve. Not that tasty. That's why most use a Gyro Vertical Broiler/Rotisserie that way each slice is seared. The sheet pan method is excellent because you can slice and sear. Also, freezing portions are convenient too.
Step Down, Cooling- I learned this from a dear friend. It's noteworthy to mention this method was created by CREA. Resting food and why we do it can be found HERE. Lowering the temperature in steps will improve the texture and help the exudated moisture be reabsorbed. What do I do? 10-15 minutes at room temp followed by another 10-20 Minutes with cold tap water (I use an aquarium pump to circulate water). Following this method Shock Ice-Water
Shock in a large container with a lot of ice. I always use an aquarium water pump to circulate Ice-Water. I've collected data to suggest there's a 25% improvement on the descending temperature. Thermodynamically when you consider conduction, convection, and the added benefit circulating water, the descending water temp is hastened. Would you ever consider buying an Immersion circulator that doesn't circulate? Circulating water creates a uniformed environment and is especially helpful when there is a change of state.
Unleashed from its bag. Because of the low temp, ingredients, and the short time there was virtually no purge. Corner trimmed off using a pizza cutter.
How to assemble- This is what I do...Warm Pita Bread in skillet. Add some Yogurt sauce, Sprinkle on Green Onion, Cilantro, Hot-Sauce, Sliced White Onion, a few slices of Tomato. Toss on some Gyro meat and wrap with parchment paper. Top with some more Yogurt Sauce and Hot-Sauce.
I've been asked many times before to provide a recipe for my Yogurt Sauce, but the taste is somewhat subjective. I'll give you some insight on how to make and the approximate amounts. I used Greek-Plain Yogurt, which weighed 24 oz. If you choose Plain Regular Yogurt, it will lack the tang that the Greek version has, so you may have to use some sour-cream. Whether it's the Greek version or the regular stuff, you need to drain off the excess water. Use a Nut-Bag or Cheese-cloth to strain. Greek Yogurt has a lot less water. Let it rest overnight or squeeze with your hands. To the Yogurt, I added about a Tablespoon of Olive Oil.
Garlic cloves come in all different sizes, but I used about 4 large ones crushed. Chopping will not work, so make sure to use a garlic press. Maybe 2-Tablespoons of finely chopped Dill and 1-Tablespoon of finely chopped mint. You be the judge. Taste as you go along. You can use a regular cucumber or an English one, but make sure to scoop out the seeds. Use large a grater or a Microplane with large openings. Grate the cucumber and sprinkle on some salt and toss. Let the mixture sit for 15-Min to remove excess moisture. Do not rinse. Use a Cheesecloth or a Nutbag to strain (use your hands to squeeze out water). I used about half the zest and most of the juice from a lemon. Add some salt if needed and give it a taste. Add salt at the end. Let's not forget the cucumber was already salted.
Start by making a loose sponge: Combine the yeast, warm water, and 1 cup flour into the bowl of a stand-up mixer. Whisk together and let stand 15 - 20 minutes for the sponge to a bubble and rise slightly.
Continue making the dough: Pour in the 1 1/2 tablespoons of olive oil and salt into the sponge. Add the 1 3/4 cup flour. Using the dough hook, mix at low speed until the dough is soft, supple, and slightly sticky. If dough sticks to the side of the bowl, add 1/4 cup more flour, just a little at a time.
Turn the dough into a lightly oiled bowl and cover with plastic wrap. Allow doubling in size; about 1-hour using rapid rise yeast, 2 hours for regular yeast.
When risen, remove the dough from the bowl and place it on a lightly floured board. Weigh the dough and divide by 5 to scale. Gently form into an oval, semi-flat shape. Use a knife to cut into 5 equally shaped balls (mine weighed 140- grams each). Form each piece into a small round ball by tucking the edges under and forming a smooth top. Cover dough balls with a lightly oiled plastic wrap and allow to rest for 30 minutes. Note- if you want to make smaller ones divide by a large number.
Begin to roll out each dough ball on a lightly floured board, about 1/4 inch thick. Allow to rest for 5 minutes while beginning to heat a cast iron skillet lightly brushed with a touch of olive oil to medium-high heat. Lay pita bread into a hot skillet and cook until dough begins to puff up, and the bottom has golden brown spots and blisters, about 3 minutes. Flip, cook 2 more minutes, and flip back onto the first side to cook for about 30 seconds. The pita will begin to puff up and fill with hot air. Stack cooked bread on a plate to cool.