Steak bearnie - Australian Avocados

Ingredients

• 1 avocado, cut into 1cm cubes
• ½ small red onion, finely chopped
• 1 tbs fresh tarragon, leaves finely chopped
• Pinch cayenne pepper
• 1 tbs white wine vinegar
• 2 x 200g beef eye fillet steaks
• 2 tsp olive oil