There are many Gruyere cheese substitutes that you can use. Swiss cheese would be the most comparable and less expensive choice but other hard and semi-hard cheeses would work too. You might try a combination of Parmesan and mozzarella, or fontina or cheddar...
You can make these and set up the muffin tin and keep in the fridge for up to 4 hours before you bake it off. If you decide to bake these ahead of time, I’d bake these off and let them cool completely. You can then put them in freezer bags and store them in the...
