With your non-dominant hand, make an O hand in front of you, then with your dominant hand held in a fist except for the pointer finger sticking out, make the sign for red and proceed to mimic a knife slicing your 'O' hand. The "knife" comes from your chin down to the "red tomato".
We use tomato contextually when learning about new foods and flavors. This can take place at home, at a restaurant, or perhaps in the garden, if you decide to grow tomatoes in the summer.
Like most foods, we teach tomato contextually when working to expand our baby’s palate. In the spring, we can also do it while gardening.