Step 1
Cook gnocchi in a large saucepan of boiling, salted water, following packet directions. Drain.
Step 2
Meanwhile, heat reserved oil from tuna in a large frying pan over medium-high heat. Add onion, garlic and chilli. Cook, stirring, for 5 minutes or until onion softens. Add capers. Cook, stirring, for 1 minute or until fragrant.
Step 3
Add tomatoes. Cook for 1 minute or until heated through. Add gnocchi, flaked tuna and olive oil. Toss over low heat for 2 minutes or until heated through. Add bocconcini and half the basil leaves. Season with salt and pepper. Toss to combine. Sprinkle with remaining basil. Serve.