The prepared toast is covered with cheese filling with the aroma of baked garlic, baked apples are laid out on top and a hot sandwich with cheese and apples, and walnuts are sprinkled on top.
Preheat oven to 180°C (356°F). Place one baking sheet on the middle rack and one on the upper rack. Line the upper rack sheet with parchment paper. Cut the top 0.5 cm from each garlic head, wrap in foil, and place on the upper rack sheet. Bake for 15–20 minutes.
Arrange the apple slices from 2 apples in a single layer on parchment on the upper rack next to the garlic. Bake for 15 more minutes until the garlic is tender and apples are cooked through. Remove from the oven and let cool for a few minutes.
Squeeze the garlic cloves from their skins into a bowl. Add the crumbled goat cheese and mash together with a fork until smooth.
Cut the baguette into 18 slices. Place on the middle rack baking sheet and toast for 6–8 minutes until golden brown (or use a toaster).
Spread roughly 2 teaspoons of the cheese-garlic mixture on each toast. Top with apple slices and sprinkle with the roasted walnuts.