In a resealable bag, combine the beef, soy sauce, cumin, paprika, and lemon juice. Seal the bag and place in fridge. Let meat marinate overnight.
Put your oven rack on the highest shelf in your oven. Turn on the broiler.
Take a skewer and thread on one piece of beef and one red pepper piece. Complete until the skewer is fully threaded with beef and pepper. Repeat for the remaining skewers. Place the skewers on a broiling pan and place the pan in the oven. Let broil for 3 minutes. Remove from oven, flip the skewers, and cook an additional three minutes.
Remove skewers from oven and let sit for 5 minutes before serving.