Moist Vegan Fruit Cake (Boiled Fruit Cake)

Name: Moist Vegan Fruit Cake (Boiled Fruit Cake)
Prep time: 25 min
Cook time: 1 h
Total time: 1 h 25 min
Cuisine: British, European
Ingredients: 200ml (0.8 cups) oat milk (or your preferred milk); 125g (1 stick & 2 teaspoons) vegan butter (or spread/marg); 3 tablespoons treacle (or molasses); 300g (11 oz) mixed dried fruit; 1 teaspoon mixed spice (see notes for alternatives); 1 teaspoon cinnamon; 1 teaspoon ginger; 225g (1.8 cups) plain flour (all-purpose flour); 200g (1 cup) brown sugar (or demerara sugar); 2 teaspoons baking powder; 1 pinch salt; 80g (1/3 cup) apple sauce