Single-serve French Onion Soup

Name: Single-serve French Onion Soup
Ingredients: 1 small-medium red onion, sliced; 2 tbsp butter; 0.25 cup red wine; 1.5 cup beef broth (@kettleandfire); 0.01 tsp balsamic vinegar (Optional); 1 sprig fresh thyme; 2 slices baguette; 0.5 cup Gruyère cheese (grated); salt; pepper

Soups that don’t suck / episode 23