I start by heating a skillet to medium, then I add ground beef, diced onion, and garlic. I break the meat into small crumbles and cook until browned (about 5–7 minutes). Then I drain excess fat and stir in chili powder, cumin, paprika, salt, and pepper to infuse flavor into every bite.
While the beef simmers, I place one tortilla flat in a greased pie dish or on a baking sheet. I spread a generous layer of refried beans over it, pressing gently so it sticks. On top, I distribute half the seasoned beef. Then I cover with a second tortilla, sealing the base portion before baking.
With the assembled bottom half, I bake in a preheated 350 °F (175 °C) oven until the tortillas become crisp and golden — about 10 minutes. This ensures a solid, crunchy foundation before the final topping.
Once out of the oven, I spoon salsa over the top tortilla, followed by both Cheddar and Monterey Jack cheeses. Then I sprinkle the diced tomatoes, green onions, and jalapeño slices (if using). I return it to the oven for another 5–10 minutes, until the cheese melts perfectly and bubbles up.
I let the Mexican Pizza rest a minute, then cut it into 4 pieces (or 8 smaller slices). I top each slice with a dollop of sour cream (if using) and scoop them onto plates, ready to enjoy.