One-Pot Easy Caprese Pasta

• 12 oz. penne pasta

• 200 gms. bocconcini cheese

• 3 roma tomatoes, chopped

• I small onion or ½ medium, chopped

• 1 Tbsp. minced garlic

• 1 small bunch fresh basil, torn

• Salt and freshly ground pepper

• Parmesan cheese, freshly grated