Dreadful photo as don't need gravy! Main ingredients don't show that though, so I think they will turn out correctly just not like the photo!
Give them a go. Just dice everything small as shown so it cooks in the time given.
Can replace meat with mature cheddar and plenty of black pepper for cheese and onion pasties.
Good luck! They tend to be a practice makes perfect item but they are delicious and worth making!