Foryoueats: Beef And Rice Stuffed Bell Peppers

Ingredients

• 6 bell peppers
• 3 cups chunky tomato sauce, divided
• ½ onion, very thinly sliced
• 1 cup beef broth
• ¼ teaspoon red pepper flakes
• 1 ½ pounds lean ground beef
• 1 ½ cups cooked rice
• ½ cup freshly shredded Parmigiano-Reggiano cheese
• ¼ cup chopped fresh flat-leaf parsley
• 4 cloves garlic, minced
• 2 teaspoons salt
• ½ teaspoon freshly ground black pepper
• 1 tablespoon chopped fresh flat-leaf parsley, divided