This light and refreshing salad is a great way to use your food processor to make a healthy and filling meal. Start by processing some cooked rice until it is finely chopped. Then, add in some canned tuna and pulse until it is roughly chopped. Mix the rice and tuna together in a bowl with some chopped vegetables, such as cucumber, tomatoes, and red onion. Add in a simple dressing made with olive oil, lemon juice, and your favorite seasonings, and toss everything together. This salad is perfect for a summer lunch or as a side dish for a barbecue.