Native to South America, had moved up to Central America and Mexico by the time European explorers arrived in the New World. The native tiny wild fruit was cultivated by our pre-Columbian ancestors and by the time Cortez reached Mexico in 1519, cultivation had already produced fist-sized tomatoes we would recognize today
When Columbus landed in the new world, he noted that
the natives ate a small yellow fruit which resembled an apple of gold.
Hence it was given the the name Pomodoro (apple of gold).
The fist tomatoes taken to Spain were yellow. Later when Cortez
traveled to Techochlan the Aztec Capitol, which is now Mexico City, he
observed the natives making sauces from red fruits which they called
Nahuatl, or Tomatal and which were not unpleasant to eat. The
natives used the tomato much like we do today in making sauces