Preheat your oven to 375 degrees f.
Heat oil in a large oven-proof skillet over medium-high heat.
Add onion and cook until softened, about 3 minutes.
Add in ground meat, garlic powder, cumin, chili powder, sea salt, and pepper.
Cook stirring well, breaking meat apart with a wooden spoon until crumbled, for about 6-8 minutes.
Stir in cooked quinoa, crushed tomatoes, beans and corn.
Remove from the heat and add cilantro, lime juice and zest.
Top with shredded cheese and transfer to the preheated oven.
Bake for 10-15 minutes, or until top is nicely golden brown and cheese is nice and melty.
Serve with your favorite toppings and enjoy.