Spaghetti with Tuna, Lemon and Dill

spaghetti

good quality extra virgin olive oil

juice and zest of 1 large lemon

best quality tuna packed in water (I didn't quite use all of the second can, that's up to you)

large handful of fresh dill fronds, chopped

small red onion, peeled, halved, and thinly sliced

Greek olives, pitted

about 1/2 tsp red pepper flakes

freshly cracked black pepper