Easy Classic Stuffed Peppers

Ingredients

• 1/2 c. uncooked rice
• 2 tbsp. extra-virgin olive oil, plus more for drizzling
• 1 medium onion, chopped
• 2 tbsp. tomato paste
• 3 cloves garlic, minced
• 1 lb. ground beef
• 1 (14.5-oz.) can diced tomatoes
• 1 1/2 tsp. dried oregano
• Kosher salt
• Freshly ground black pepper
• 6 bell peppers, tops and cores removed
• 1 c. shredded Monterey jack
• Freshly chopped parsley, for garnish