As i remember i read somewhere here they patterned it in a haggis version

but anyway maybe pork will do just fried it until it looks cruchy then chop it, after that put onions, pepper, salt,bit spicy,calamansi or lemon and a few mayonnaise

I hope it helps even it doesnt taste that much like the sisig she used to eat, the effort you've made will please her
Goodluck

Leah