Sauté the ground beef and diced red onion in a heavy skillet until the meat is browned; add minced garlic, cumin, and paprika during the final minute of cooking.

Stir the fire-roasted tomatoes and black beans into the meat mixture, simmering on low heat for five minutes to integrate the juices.

In a small mixing bowl, whisk together the Greek yogurt with half a cup of shredded cheddar until smooth.

Assemble the bake in a deep baking dish by placing a single layer of quartered tortillas on the bottom, followed by a scoop of the meat mixture, then a thin spread of the yogurt blend, and a sprinkle of cheese.

Cover loosely with foil and bake at 191 °C for 20 minutes, then remove the foil and bake for an additional 10 minutes until the cheese is bubbling and golden.