Make the marinade. In a medium bowl, whisk together the grated garlic, lemon zest, lemon juice, and olive oil. Add salt and pepper to taste — go heavy on the pepper if you’re in that mood.
Toss the beans. Add the drained beans to the bowl and stir gently to coat. You want them coated, not mashed.
Add the extras. Stir in the herbs and olives. If using tuna, gently flake it in now — or save it for scattering on top at the end, your call.
Let it sit. Ideally, let the mixture marinate at room temp for 20–30 minutes. Or eat it right away if you're impatient — it’s still great.
Serve. Spoon into a shallow bowl, drizzle with a little more olive oil, and scatter extra herbs or lemon zest on top if you’re feeling theatrical. Eat with torn pieces of bread, preferably while standing over the counter pretending you’re just “tasting.”