French Onion Pasta - Food By The Gram

Ingredients

• 2 tbsp olive oil
• 2 yellow onions (thinly sliced)
• 4 garlic cloves (minced)
• 1 tbsp fresh thyme
• 1/4 cup balsamic vinegar
• 2 tsp corn starch
• 3.5 cups beef broth (or vegetable broth)
• 1.5 cups water
• 16 oz dried bow ties ( or other short cut pasta)
• 1/4 cup shredded parmesan cheese
• 1/4 cup shredded gruyere cheese
• salt and freshly ground black pepper to taste
• fresh thyme for serving