Spicy tomato and sausage gnocchi with fennel and spinach

Ingredients

• 400 g herby sausages
• 1 tbsp olive oil
• 1 onion, finely chopped
• 2 fennel bulbs, diced
• 3 garlic cloves, crushed
• 800 g tins plum tomatoes
• 1/2 tsp dried chilli flakes
• 2 tsp dried oregano
• 2 bay leaves
• 1 tbsp tomato puree
• 3 tbsp Kikkoman Naturally Brewed Soy Sauce
• 500 g pack fresh gnocchi
• 100 g baby spinach
• Small pack of basil, leaves chopped
• Grated parmesan, to serve