Chicago Italian Beef Recipe: My Foolproof Slow - Kitchen20

Ingredients

• 3-4 lb boneless chuck roast, trimmed
• 1 tbsp olive oil
• 1 large yellow onion, chopped
• 4 cloves garlic, minced
• 1 green bell pepper, chopped
• 1 red bell pepper, chopped
• 1 (14.5 oz) can diced tomatoes, undrained
• 4 cups beef broth
• 1 cup water
• 1/4 cup red wine vinegar
• 2 tbsp Italian seasoning
• 1 tbsp dried oregano
• 1 tsp garlic powder
• 1 tsp onion powder
• 1/2 tsp red pepper flakes (optional)
• 1 tsp salt, or to taste
• 1/2 tsp black pepper, or to taste
• 6-8 crusty Italian rolls or hoagie buns
• Giardiniera or sweet peppers, for topping
• Provolone cheese slices (optional)
• Au jus (reserved cooking liquid)