Easy sausage casserole

Name: Easy sausage casserole
Ingredients: 2 tbsp olive or rapeseed oil; 1 onion, finely chopped; 2 medium sticks celery, finely chopped; 1 yellow pepper, chopped; 1 red pepper, chopped; 6 cooking chorizo sausages (about 400g); 6 pork sausages (about 400g); 3 fat garlic cloves, chopped; 1 ½ tsp sweet smoked paprika; ½ tsp ground cumin; 1 tbsp dried thyme; 125ml white wine; 2 x 400g cans cherry tomatoes or chopped tomatoes; 2 sprigs fresh thyme; 1 chicken stock cube; 1 x 400g can aduki beans, drained and rinsed; 1 bunch chives, snipped (optional)