Onions are one of the richest sources of flavonoids in the human diet and red onions are a variety that is more naturally higher in these anti-cancer chemicals. Adding a variety of onions and shallots to the diet can help in inhibiting liver and colon cancer cell growth as well as other types of cancers and gives you a good source of vitamins and nutrients. Here is a simple to make but full of flavor red onion salad that includes other ingredients also known to aid in the fight against cancer through diet.

Vicki's Red Onion Salad
1 red onion (cut in half and slice thinly)
1 cucumber (peeled and cut into thin slices)
2 Large Tomatoes (cut into wedges)
1 cup thinly sliced daikon radish
1/4 cup olive oil
1 tablespoon toasted sesame oil
1/4 cup balsamic vinegar
1 tablespoon minced garlic
2 tablespoons fresh cilantro finely chopped

Combine all vegetables in a bowl and toss. In a small bowl whisk the oils, vinegar, garlic and cilantro together and pour over salad ingredients and refrigerate for 30 minutes before serving to let the dressing soak in. Toss again lightly before serving individual portions. Serves 4 to 6.