Easy Sloppy Joe Casserole with Biscuits

Ingredients

• 1 1/2 lb (680 g) ground beef, 85 to 90 percent lean
• 1 small yellow onion, finely diced
• 1 green bell pepper, finely diced
• 3 cloves garlic, minced
• 1 can (15 oz or 425 g) tomato sauce
• 1/2 cup (120 g) ketchup
• 1 tablespoon packed brown sugar, plus more to taste
• 1 tablespoon Worcestershire sauce
• 1 tablespoon yellow mustard
• 1 teaspoon apple cider vinegar or white vinegar
• 1 teaspoon smoked paprika
• 1/2 teaspoon kosher salt, plus more to taste
• 1/4 teaspoon black pepper
• 2 cups (225 g) shredded sharp cheddar cheese
• 1 can (16.3 oz or 462 g) refrigerated flaky biscuits, 8 count
• 2 tablespoons (28 g) unsalted butter, melted
• 1 tablespoon chopped parsley, optional