Is this a good diet veggies fruits and egg whites and protein shakes?

i wanted to lose my belly fat and wanna get lean i just wanna know if this is a good diet to go into i workout 5 days a week cardio and lift weights on mon wed and friday. I don't smoke or drink alcohol just been focus and committed to getting fit any advise to tweak this will be appreciated again i only eat veggies like broccoli cauliflower asparagus & spinach and for protein i eat egg whites & protein shakes & some sardines sometimes peanut butter also use extra virgin olive oil when i cook or stir fry i also take multi vitamins and drink lots of water thanks!