Prep your ingredients. Slice the vegetables, open the olives, and shred the cheese if not pre-shredded. This makes assembly quick.
Brown the beef. Heat a large skillet over medium-high. Add ground beef, season with salt, pepper, and Italian seasoning.
Cook, breaking it up, until browned and no longer pink, about 6–8 minutes.
Drain if needed. If there’s a lot of grease, spoon off the excess. You want flavor, not a greasy bowl.
Add aromatics. Stir in minced garlic and a pinch of red pepper flakes. Cook 30–60 seconds until fragrant.
Stir in the sauce. Add low-sugar marinara and simmer for 2–3 minutes to thicken slightly.
Taste and adjust salt or seasoning.
Layer the “pizza.” Reduce heat to medium-low. Sprinkle half the mozzarella over the beef. Top with pepperoni, mushrooms, bell pepper, onion, and olives.
Finish with the remaining cheese.
Melt and meld. Cover the skillet for 2–3 minutes until the cheese is fully melted. If your skillet isn’t oven-safe, keep it covered. If it is, you can broil briefly for golden spots.
Finish and serve. Garnish with fresh basil or parsley if you like.
Spoon into bowls while hot.