Keto onion soup baked with gruyère

Ingredients

for 4 servings

• Sliced onion180 g (6.3 oz)
• Butter50 g (1.8 oz)
• Grated gruyère120 g (4.2 oz)
• Chicken stock700 g (24.7 oz)
• Heavy cream60 g (2.1 oz)
• Salt1 g
• Pepper1 g

Directions

1. Finely slice the onions. In a casserole, melt the butter and caramelise the onions in it for 20 minutes over low heat, stirring regularly, until nicely golden.
2. Pour in the chicken stock and the heavy cream, then simmer for 10 minutes over low heat.
3. Adjust the salt and pepper.
4. Divide the soup between three ovenproof bowls and cover generously with grated gruyère.
5. Preheat the broiler and put the bowls under it until the cheese is golden and bubbling. Serve immediately, very hot.