Crockpot Pot Roast

Ingredients

• 1 (4 pound) beef roast (such as chuck, eye of round, etc.)
• salt and pepper to taste
• 1 onion, sliced
• 4 cloves garlic, chopped
• 1 tablespoon fresh rosemary, chopped (or 1/2 tablespoon dried rosemary)
• 1 teaspoon fresh thyme, chopped (or 1/2 teaspoon dried thyme)
• 1 cup beef broth
• 2 tablespoons flour (rice flour for gluten-free)
• 1 teaspoon dijon mustard (optional)
• 1 tablespoon Worcestershire sauce
• 2 teaspoons black pepper, coarsely ground
• salt to taste