Mushroom kale spaghetti

Name: Mushroom & kale spaghetti
Ingredients: 250g spaghetti; 2 tbsp olive oil; 4 garlic cloves, thinly sliced; 1 red chilli, thinly sliced; 400g chestnut mushrooms, thinly sliced; 150g kale, stalks removed and roughly chopped; 400g can butter beans, drained; 2 tbsp white miso paste; 1 lemon, juiced; 125ml crème fraîche (optional)