Provençal Stuffed Tomatoes

Name: Provençal Stuffed Tomatoes
Ingredients: 4 medium beefsteak or large vine-ripened tomatoes (about 2 lb.); Kosher salt and freshly ground black pepper; 3 Tbsp. extra-virgin olive oil, divided; Two 3-oz. Italian-style chicken sausages, casings removed; 1 small yellow onion, finely chopped; 3 garlic cloves, finely grated; 2 tsp. herbes de Provence; 1½ cups cooked brown rice; ⅓ cup coarsely chopped fresh parsley; 3 Tbsp. freshly grated parmesan cheese