This Easy Sheet Pan Beef Fajitas is zesty, bright, and mess-free! The secret lies in a flavorful marinade. Seasoned beef is oven-broiled on a sheet pan with a mixture of peppers and onions.
TIP: Meanwhile the veggies and meat are cooking, wrap tortillas in foil and place on another rimmed baking sheet in the oven until warmed through, about 5 minutes.
BEEF: If you wish to cook the beef whole, add it to the marinade, cover or seal and refrigerate for 30 minutes to 24 hours (what time permits). Broil, for about 7-10 minutes on each side or until meat is desired doneness. Meat internal temperatures: Medium rare: 135º, or Medium: 150º. Allow meat to rest for 5 minutes before slicing.
Marinade Add-ons: Add 1 teaspoon of red chili flakes to the marinade if you like heat, and/ or add 1/4 cup of light beer to enhance the flavors even more.
How to cut beef against the grain?
To slice the beef, place it in front of you. First, find the direction of the grain, in a few words: which way the muscle fibers are aligned. Then slice across the grain, 90 degrees through the fibers, rather than parallel with it.
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Please note that nutritional information is a rough estimate and it can vary depending on the products used.