Baked salmon with chimichurri + avocado

• 1.5 kg side of salmon, skin on
• 1 avocado, diced
• 1 cup fresh continental parsley
• .5 cup coriander (cilantro) + ½ cup for garnish
• 1.5 tbsp dried oregano
• 4 garlic cloves 
• .25 cup red wine vinegar
• 3 tbsp lemon, juiced
• 1 red onion
• .6 cup extra virgin olive oil
• 2 red chillies, medium heat