Place the ground beef in a skillet with a drizzle of oil. Add the spices and cook, stirring, until the meat is done. Remove from heat.

For the guacamole: Mash the avocados until smooth, then mix in the finely chopped tomato and onion. Add a little salt and, if desired, a squeeze of lime juice.

On a baking dish, layer the tortilla chips, some of the shredded cheese blend, the cooked meat, and the guacamole. Bake at 350°F (180°C) for 8 minutes.