Step 1 Preheat oven to 400° and grease an 8" or 9" springform pan with cooking spray. In a large skillet over medium heat, heat oil. Add onion and cook, stirring, until softened, about 7 minutes. Add garlic, chili powder, and cumin and cook, stirring, until fragrant, about 1 minute. Add ground beef and cook, breaking up meat with a wooden spoon, until no longer pink, about 6 minutes. Drain fat. Step 2 Add tomatoes and tomato paste and cook over medium heat, stirring occasionally, until warmed through, about 2 minutes; season with salt and pepper. Step 3 Place a tortilla on bottom of prepared pan. Top with a layer of beef mixture and a handful of cheddar and Monterey Jack. Repeat for 5 layers total, ending with cheese. Step 4 Bake taco pie until cheese is melty and tortillas are warmed through, about 20 minutes. Let cool in pan 5 minutes. Step 5 Garnish with desired toppings before slicing.

Cooking spray 1 tbsp. extra-virgin olive oil 1 large yellow onion, chopped 2 cloves garlic, finely chopped 1 tsp. chili powder 1 tsp. ground cumin 1 lb. ground beef 2 tomatoes, chopped 2 tbsp. tomato paste Kosher salt Freshly ground black pepper 6 medium flour tortillas 1 c. shredded cheddar 1 c. shredded Monterey Jack Pico de gallo, sour cream, and fresh cilantro, for serving