Easy Instant Pot French Onion Soup - Sprinkles & Sea Salt

Ingredients

• 3 tbsp unsalted butter
• 6 cups yellow onion, sliced and chopped small
• 2 tsp sea salt, divided
• 1 shallot, chopped small
• 2 cloves garlic, crushed
• 2 tbsp dark brown sugar
• 1 tbsp white all-purpose flour
• 1 whole bay leaf
• 1 tsp fresh thyme, divided
• 4 cups low sodium beef broth
• 1/2 cup dry cooking sherry, divided
• 1 stale french baguette
• 1 cup grated Gruyére cheese
• fresh thyme for garnish