Grilled Marinated Pineapple Skirt Steak

Skirt steak is a cut of beef from the plate. It is long, flat, and prized for its flavor rather than tenderness. Not to be confused with flank steak.
To minimize toughness and add flavor, skirt steaks are often marinated before grilling or pan-searing very quickly, or cooked very slowly, usually braised.  They are typically sliced against the grain before serving to maximize tenderness.

Here is a great recipe from one of my favorite chefs, Emeril Lagasse.

Ingredients: (4 servings)
1 cup pineapple juice
1/2 cup fresh pineapple, large dice
1 cup low sodium soy sauce
1/2 cup granulated sugar
1 tblsp minced garlic
1 tblsp minced ginger
1 to 1 1/2 lbs skirt steak
Directions:
Place first six ingredients in to a bowl and mix well.
Place skirt steak in to marinade and marinate for 1 to 2 hours.
Pre-heat the grill to medium-high heat and lightly oil the grill grates.
Remove steak from marinade, pat dry and grill to your liking, along with the pineapple chunks.
Remove steaks from the grill and allow to rest briefly before slicing thinly across the grain.