In a medium bowl, whisk together soy sauce, lime juice, orange juice, canola oil, brown sugar, minced garlic, fajita seasoning, jalapenos, cumin and black pepper. Season to taste with salt.
½ cup low-sodium soy sauce, ½ cup fresh lime juice, Juice from 1 large orange, ½ cup canola oil, 3 tablespoons packed dark brown sugar, 2 medium cloves garlic, 2 medium jalapeno peppers, 1 tablespoon fajita seasoning, 1 teaspoon ground cumin, 1 teaspoon freshly ground black pepper, Kosher salt