Slow Cooker Chicken And Chorizo Paella

Name: Slow Cooker Chicken And Chorizo Paella
Ingredients: 100g of chorizo, sliced into rounds; 3 chicken breasts, cut into bite-sized pieces; 1 tsp of paprika; 1 tsp of ground turmeric; 1 tsp of crushed garlic or garlic purée; 1 tsp of chilli powder; The juice from 1 lemon; 1 onion, finely chopped; 1 can (400g) of chopped tomatoes; 900ml of chicken stock; A handful of fresh parsley, roughly chopped, plus extra for garnish; 350g of paella rice; 1 red pepper, diced; 150g of frozen peas; Salt and pepper, to your taste; Lemon slices, for garnishing