Preheat your oven to 400°F (200°C).

In a large skillet over medium-high heat, cook the ground beef along with the diced yellow onion for about 8 minutes, stirring occasionally until the beef is browned and onions are tender. Drain excess fat.

Add the taco seasoning and a splash of water to the skillet. Stir well and simmer for about 5 minutes until liquid reduces and flavors meld.

Line two baking sheets with parchment paper and evenly spread your tortilla chips across both sheets.

Spoon a layer of refried beans over the chips, followed by the seasoned beef, and top with shredded cheese.

Bake in the preheated oven for about 15 minutes until the cheese melts and becomes bubbly.

Remove from the oven and top with diced Roma tomatoes and sliced green onions before serving.