Sweet potato: 200g (1 large, peeled and cubed), Salmon (canned, drained): 150g (5 oz), Green onions: 30g (3 tbsp, chopped), Bell pepper: 50g (1/2 cup, finely diced), Egg: 50g (1 medium), Whole wheat breadcrumbs: 30g (1/4 cup), Dijon mustard: 5g (1 tsp), Dill: 5g (1 tbsp, fresh, chopped), Lemon zest: 2g (1 tsp), Olive oil: 10ml (2 tsp), Mixed greens: 60g (2 cups), Lemon wedges: for serving, Black pepper: to taste