Amazing slow-cooker mulled wine

Name: Amazing slow-cooker mulled wine
Prep time: 5 min
Cook time: 4 h 5 min
Total time: 4 h 10 min
Cuisine: European, British
Ingredients: 250ml (1 cup) pulp-free orange juice; 55g (1/4 cup) caster sugar; 3 whole star anise; 2 cinnamon sticks, plus extra, to serve (optional); 5 cardamom pods; 5 cloves; 1/4 tsp fennel seeds; 750ml bottle fruity red wine (see notes); 3-4 strips orange rind; 1 orange, thinly sliced; Pomegranate seeds, to serve