Ultimate Sloppy Joes

Ingredients

• 1 clove garlic
• 1/4 teaspoon ground black pepper
• 1 pound lean ground beef
• 2 teaspoons yellow mustard
• 1/2 teaspoon Kosher salt
• 1 tablespoon unsalted butter
• 1/2 green bell pepper
• 1/2 yellow onion
• 2 tablespoons brown sugar
• 3/4 cup ketchup