Cook the pasta in plenty of boiling salted water for about 9 minutes. In the meantime drain the tuna. Peel garlic and cut into slices. Heat 1 tablespoon of olive oil in a frying pan and fry the garlic slices for about 1 minute until golden brown. Remove from the pan and cool down.
Put the capers in the pan and fry over high heat for about 5 minutes. Remove from the pan and let it cool down. Drain the pasta, rinse and drain. Clean and wash the zucchini and cut into strips with a peeler. Wash and halve the cherry tomatoes. Mix lemon juice with sugar, salt and pepper. Fold in 3 tablespoons of olive oil. Add garlic to the vinaigrette. Mix the pasta, tuna, capers, zucchini and tomatoes with the vinaigrette.
Wash and halve the cherry tomatoes. Mix lemon juice with sugar, salt and pepper. Fold in 3 tablespoons of olive oil. Add garlic to the vinaigrette. Mix the pasta, tuna, capers, zucchini and tomatoes with the vinaigrette. Sprinkle with coarsely ground pepper and garnish with lemon wedges