Preheat oven to 425°F and grease a 9x13 baking dish with cooking spray. Set aside.
In a skillet set over medium-high heat, add the olive oil and allow to heat up.
Add the ground beef, chili powder, coriander, salt, pepper, and cumin. Cook for 5 minutes, stirring occasionally, breaking up the beef with a wooden spoon.
Add the onion, black beans, red onion, red pepper, corn kernels, and garlic. Cook for a further 5 minutes.
Lower the heat and add the salsa. Allow to simmer for 7 minutes.
Line previously prepared baking dish with tortillas, overlapping slightly.
Taste the beef mixture for salt and adjust as needed. Then, spoon 1/3 of the beef mixture on top of the tortillas and spread into an even layer. Sprinkle 1/3 of the shredded cheddar cheese over the beef.
Repeat this layering process twice more, ending with cheese.
Bake for 20 to 25 minutes, or until hot and bubbly.
Remove from oven and let stand for 10 minutes before serving.