Cook the pasta according to the packet instructions.
Meanwhile make the pesto. Place the basil, sesame seeds, garlic and olive oil into a mini blender and blend until smooth.
Drain the pasta and return to the saucepan. Toss the pesto with the hot, cooked pasta.
Heat a pan and pan fry the cherry tomatoes with the balsamic vinegar on a high heat for 1-2 minutes.
Serve tomatoes on top of the pesto pasta, and garnish with chives to serve.