Spicy spaghetti with garlic mushrooms

INGREDIENTS

• 2 tbsp olive oil
• 250g pack chestnut mushrooms , thickly sliced
• 1 garlic , thinly sliced
• small bunch parsley , leaves only
• 1 celery stick, finely chopped
• 1 onion , finely chopped
• 400g can chopped tomatoes
• 1⁄2 red chilli , deseeded and finely chopped, (or use drieds chilli flakes)
• 300g spaghetti