Hamburger Stew

Ingredients

• 1 lb. ground beef
• 1 onion, sliced
• 1 1/2 tsp. salt
• 1/4 tsp. pepper
• 1 Tbsp. Worcestershire
• 1 (16 oz.) can tomatoes
• 3 potatoes, sliced
• 3 carrots, sliced
• 2 ribs celery, chopped