Sloppy Joes

Ingredients

• 1 medium onion, sliced thinly
• 2 tbsp olive oil
• ¾ pound lean ground beef
• 2 cloves garlic, minced
• 1 tbsp Worcestershire sauce
• 1 tbsp cider vinegar
• 2 tbsp tomato paste
• 1 tbsp Dijon mustard
• ½ cup tomato sauce
• ¼ cup beef stock
• ¼ cup dry red wine (or additional beef stock)
• 4 tsp granulated sugar substitute
• Salt and pepper to taste
• 2-3 drops hot sauce (more if desired)
• ½ cup sautéed mushrooms (optional)
• 3 whole-wheat sandwich thins or pitas