With the blade of a large knife flat on it, crush the garlic clove by pressing your lower palm - no need to peel it.
Trim and slice the zucchini as finely as possible.
Finely chop the mint leaves.
Discard the olive from the tuna.
Heat two tablespoons of olive oil in a large pan, add the garlic clove, and brown it for about five minutes.
Add the zucchini slices and a couple pinches of salt, and cook over medium heat, stirring every now and then until a soft crust forms on the zucchini - five to ten minutes.
Meanwhile, bring a big pot of salted water to a boil - about two liters (half a gallon) and one tablespoon of salt.
Toss in the pasta and cook it according to package directions.
Add the tuna fillets and the chopped mint to the zucchini pan and cook, stirring to amalgamate, for about five minutes.
Halfway through the pasta cooking, collect half a cup of the boiling water and pour it into the condiment pan.