Take 4-5 ripe medium avocados, firm but still have some give when squeezed, and cut them in half lengthwise around the pit. Separate the sides and remove the pit from the side it stuck to.
Use a knife to score slices into the flesh of each side, all the way down to the skin, both across and top to bottom to make a grid of squares. Use a large spoon, and scoop the squares of flesh out of the skin and into a medium bowl. repeat with all of the avocado.
Next, take a ripe mango and cut on the flatter sides of the fruit from top to bottom, as close to the pit as possible. Take the cut sides and score them similar to the avocado.
To remove the mango from the skin, take a tall drinking glass and push the lip of the glass just between the mango and the skin (with the mango facing the center of the glass. Gently push and slide the mango and skin down, so the glass edge separates the two and the mango falls into the glass.
To the bowl of avocado, add about half of the mango cubes, all of the tomato, cilantro, red onion, jalapeño, lime juice, salt, pepper, and onion powder.
With an avocado masher or fork, mash the entire mixture until it reaches your desired level of chunky or smoothness,
Taste and adjust seasonings accordingly then fold in the remaining mango so it stays more whole/chunky.
Serve immediately with tortilla chips or as a condiment for tacos, quesadillas, or any of your favorite Mexican/ Tex Mex dishes