Easy Creamy Gnocchi

• 500 g gnocchi
• 1 tbsp extra virgin olive oil
• 1 brown onion, finely chopped
• 300 g broccoli florets
• 1 cup green peas
• 3 tbsp creme fraiche
• 1 tsp dijon mustard
• 2 tbsp lemon juice
• 2 tbsp pine nuts, toasted