Preheat your oven to the temperature specified on the frozen garlic toast packaging.
In a skillet set over medium-high heat, crumble the ground beef and cook until it is evenly browned. Drain any excess fat, then mix in the spaghetti sauce. Allow the sauce to simmer for 7-10 minutes, stirring from time to time.
While the sauce is simmering, arrange the garlic toast on a baking sheet and bake as instructed on the package until both sides are golden and crisp.
Spoon the simmered meat sauce over each piece of garlic toast and generously sprinkle with shredded mozzarella cheese. Serve immediately while hot, garnished with fresh parsley.