Meaty Spaghetti Sauce

Ingredients

• 1 pound lean ground beef
• 1 pound ground pork sausage
• 2 ounces sliced pepperoni sausage
• 2 medium onions chopped
• 2 medium carrots diced
• 2 stalks celery chopped
• 1 medium green bell pepper chopped
• ½ medium red bell pepper chopped
• 1 tablespoon minced garlic
• 2 (14.5 ounce) cans diced tomatoes
• 1 (15 ounce) can tomato sauce
• 2 (6 ounce) cans tomato paste
• 1 (8 ounce) can sliced mushrooms
• 1 cup beef broth
• 3 cubes beef bouillon
• 1 ½ tablespoons dried oregano
• 1 ½ teaspoons dried basil
• 1 tablespoon dried thyme
• 1 tablespoon white sugar
• 3 bay leaves
• 1 teaspoon ground black pepper
• ½ teaspoon crushed red pepper flakes