Slow Cooker Traditional Swedish Meatballs

Ingredients

• 1 egg
• 1 tablespoon Dijon mustard
• 1/2 teaspoon pepper
• 1/4 teaspoon ground allspice
• 1/4 teaspoon salt
• 1 pinch nutmeg
• 1 small onion grated
• 1/4 cup dry bread crumbs
• 1 lb lean ground beef
• 6 cups sliced mushrooms (about 1 lb/450 g)
• 1 teaspoon dried thyme
• 1 1/2 cup sodium-reduced beef broth
• 1/2 cup light sour cream
• 1/4 cup all-purpose flour
• 1 tablespoon lemon juice
• 4 cups hot cooked egg noodles (about 2 cups uncooked)