Preheat your oven to 350°F (175°C). Gather your ingredients.

Using a serrated knife, slice each croissant in half lengthwise and lay them cut-side up on a baking sheet.

In a medium mixing bowl, combine softened goat cheese, honey, and cinnamon. Mix until smooth, adding milk if needed.

Spread the goat cheese mixture on the croissant bottoms, layer with sliced apples, and add arugula if using. Top with croissant halves.

Bake the sandwiches in the preheated oven for 5-7 minutes until golden brown.

Remove from the oven, let them cool slightly, and serve immediately.