Try Bbq or go for a picnic when in Perth.
Bbq picnic at public park is a popular activity especially when it is warmer/sunny.
My personal favourite bbq picnic spot is at Burswood park near Crown Towers as the public bbq burner is free and always clean and has a great ambience of the Swan river.
Recommended bbq / picnic spots:
https://www.broadsheet.com.au/perth/food-and-drink/perths-best-barbeque-spots
https://www.google.com/maps/placelists/list/17rztCdbpE5scajp5okmg0qkS4rA?hl=en
https://www.google.com/maps/placelists/list/17rztCdbpE5scajp5okmg0qkS4rA?hl=en
https://www.truelocal.com.au/blog/lifestyle-2016-parks-perth
Cooking tip:
http://www.beefandlamb.com.au/Learn/Cooking_tips/Barbecue/The_difference_between_common_beef_steak_cuts
https://youtu.be/AmC9SmCBUj4