Slow cooked rib steak with Cuban mojo salsa

Name: Slow cooked rib steak with Cuban mojo salsa
Ingredients: 1 rib steak on the bone or côte du boeuf (about 800g); 1 tbsp rapeseed oil; 1 garlic clove; 2 thyme sprigs; 25g butter, chopped into small pieces; sweet potato fries; a dressed salad, to serve; 2 limes; 1 small orange; ½ small bunch mint, finely chopped; small bunch coriander, finely chopped; 4 spring onions, finely chopped; 1 small garlic clove, crushed; 1 fat green chilli, finely chopped; 4 tbsp extra virgin rapeseed oil or olive oil