Sticky baked meatloaf with avocado black bean salsa

Name: Sticky baked meatloaf with avocado & black bean salsa
Ingredients: 1 tbsp rapeseed oil, plus a little for greasing; 2 large onions, halved and thinly sliced; 4 large garlic cloves, grated; 1 tsp allspice or mixed spice; 1 ½ tsp fennel seeds; 2 tbsp smoked paprika; 2 tbsp tomato purée; 50g quinoa; 160g grated carrot; 1 tsp dried oregano; ½ tsp ground cumin; 400g pack turkey leg and breast mince; 1 large egg; 1 tsp black treacle; 400g black beans, drained; 1 small red onion, finely chopped; 1 avocado, finely chopped; 2 tomatoes, finely chopped; ½ small pack fresh coriander, chopped; 1 red chilli deseeded and finely chopped (optional); juice 1 lime