I found skirt steaks recently and they are not always available unless you really look or ask. The first time I had skirt steak was at the Fog City Diner in SF. This was in the 80's, mind you, but that was the dish to order. It was served, unsliced, with a huge pile of delicious shoe string fries!
This past Friday night, I made up my own quick marinade. Skirt Steaks are long so I cut it in half. One end is thicker than the other so if you want them both the same done-ness, place the thick one on the grill first. For the marinade, I used about
2 Tbl Soy Sauce, 1 Tbl Rice Vinegar, 1 Tbl Stone Ground Mustard, 2 Tbl Brown Sugar, 2 Tbl Water, 1/4 tsp Coriander and Cracked Peppercorn to taste. You can add
Garlic or even
Red Pepper Flakes for more bold flavor.
Years ago, I bought a neat Tupperware container for marinating. It has a waffle design so the marinade touches whatever you are marinating. You add the lid, a similar design, and just flip the container e very so often. It all goes in the dishwasher. I highly recommend investing in something like this if you marinade a lot; I use it just about weekly. I make my marinated right in the container and simply add the meat. Marinate the skirt steak(s) for at least an hour. When ready, preheat the grill with the lid shut, to at least 600-650 degrees.
Oh, I should add, we finally replaced our infer-red grill! I am back to doing what I love!!
To grill the steak, place on the grill on the diagonal. You are going to cook both sides twice to get cross marks. For medium rare, cook the first side for about 3-3.5 min then flip and cook for another 3-3.5 minutes. Then turn 90 degrees to the marks you have on the first side and cook for at least 3-4 minutes. Then finally flip to the 2nd side again and cook for at least 3-4 minutes. The grill will cool down so you may even had to go 4 minutes on the second cooking. NOTE: Think about your flipping before you mess with this so your marks are good.
I served mine with oven made Fries. I thinly cut elongated New Potatoes and tossed in good quality Olive Oil and cooked til crispy. They take over an hour in a 375 oven, turning about every 20 minutes.
The skirt steak can be grilled and served whole or can be sliced after resting for 5 minutes. The sliced steak is delicious leftover in a Fajita or Steak Quesadilla!!
I made Homemade Mozzarella for the second time. This turned out better than the first time because I pulled it longer. It was firmer and held its shape better. One gallon of milk made 2 generous 8oz portions of cheese. 
