Name: Four-Cheese Souffle
Prep time: 30 min
Cook time: 40 min
Yield: 4
Cuisine: French
Ingredients: 1 onion, diced; 60g butter; 4 tbsps plain flour; 250ml whole milk; 60g grated Cheddar cheese; 60g grated Swiss cheese; 30g grated Monterey Jack cheese; 30g grated Muenster cheese; Salt and pepper; 5 eggs, separated