# What You’ll Need:
→ Vegetables
01 - 1 cup cremini or white button mushrooms, cleaned and sliced
02 - 1 small shallot, finely chopped
03 - 1 clove garlic, minced
→ Dairy
04 - 4 slices Swiss cheese
05 - 2 tablespoons unsalted butter, softened (plus extra for sautéing)
→ Bread
06 - 4 slices rye bread
→ Seasonings
07 - 1 tablespoon olive oil
08 - Salt and black pepper, to taste
09 - 1 teaspoon fresh thyme leaves (optional)
# Step-by-Step Guide:
01 - Heat olive oil and 1 tablespoon butter in a skillet over medium heat. Add shallot and sauté for 1 minute until softened.
02 - Add mushrooms and cook, stirring, for 5 to 7 minutes until golden and liquid has evaporated. Stir in garlic and thyme; cook an additional minute. Season with salt and black pepper. Remove from heat and set aside.
03 - Arrange rye bread slices. Place a slice of Swiss cheese on two bread slices. Spoon mushroom mixture evenly over the cheese, then top with another slice of cheese. Cover with remaining bread slices.
04 - Spread butter on the outside surfaces of each sandwich.
05 - Clean skillet and return to medium-low heat. Cook sandwiches for 3 to 4 minutes per side until bread is golden brown and cheese melts, pressing gently with a spatula as needed.
06 - Slice sandwiches and serve immediately while warm.