Avocados Stuffed With Quinoa, Corn and Tomato

In a frying pan, saute the chopped onion in the olive oil on medium-low heat until the onion is translucent.
Carefully cut the avocados in half lengthwise.
Use a sharp knife to remove the pit and pulp, keeping the shells intact and discard the pits.
Chop the flesh and combine with the other ingredients, including the cooked onion.
Fill avocado halves with filling and serve.