Medium Fajita Seasoning Mix The fajita is a classic of Northern Mexican border cooking often referred to as Tex-Mex. Strips of beef, chicken or pork are cooked with flavoursome spices, sliced bell peppers and onions, often served sizzling hot on a cast iron platter. Our seasoning mix with chilli pepper, cumin, paprika and oregano is perfect for making delicious, medium spice, chicken fajitas at home.