SHOPPING LIST: Tuna and White Bean Salad (1 portion)
Meal Plan 1, Monday lunch

[ ] 1 tin tuna in spring water (about 145 g)
[ ] 1 tin cannellini beans (400 g). You need half, about 120 g drained
[ ] 1 small red onion (you need about 30 g, a quarter)
[ ] 1 lemon (you need half)
[ ] Olive oil (1 tbsp)
[ ] Salt
[ ] Black pepper

Cupboard check: olive oil, salt and pepper are probably already at home.
Leftovers: half a tin of beans (keep covered in the fridge, use within 2 days), three quarters of the onion and half a lemon.