Sloppy Joe - Trois fois par jour

Ingredients

• 1 lb lean ground beef
• 2 tablespoons butter
• 1/2 red pepper, finely diced
• 1 medium onion, finely chopped
• 1 clove garlic, minced
• 1/3 cup ketchup
• 1/3 cup chicken broth
• 1 teaspoon Worcestershire sauce
• 2 teaspoons chili powder
• 1 tablespoon brown sugar
• 4 lettuce leaves
• 4 hamburger buns