Stashcook | Breakfast tacos

Ingredients

• 1 small red onion, halved and thinly sliced
• 5 tbsp red wine vinegar
• 2 tsp caster sugar
• 3 tbsp olive oil
• 4 spring onions, chopped
• 1 clove garlic, crushed
• a pinch dried red chilli flakes
• 400g tin black beans, drained and rinsed
• 12 mini cooking chorizos, cut into chunky slices
• a knob butter
• 4 eggs, beaten with a splash of milk and seasoning
• 6 small corn tortillas, griddled or scorched
• 1 avocado, diced and tossed with lime juice
• 1 red chilli, finely chopped