In a large skillet over medium heat, heat olive oil until shimmering.
Add diced onion and green bell pepper. Cook, stirring occasionally, until softened, about 5 minutes.
Add ground beef and cook, breaking it up with a wooden spoon, until fully browned. Drain excess grease if needed.
Stir in minced garlic and cook for 30 seconds, just until fragrant.
Add both cans of tomato soup, diced tomatoes, and cooked noodles to the pan. Stir until combined.
Season with kosher salt and ground black pepper. Stir again.
Reduce heat to low and simmer for 5 minutes or until everything is heated through.
Serve hot, garnished with chopped fresh parsley