Mix the granulated sugar and 1 tablespoon of ground cinnamon in a shallow dish wide enough to fit a tortilla.
Preheat your oven to 375°F (190°C). Lightly brush both sides of each tortilla with melted butter.
Press each buttered tortilla into the cinnamon-sugar mixture, coating both sides generously.
Drape the coated tortillas over the bars of your oven rack, creating a taco shell shape. Alternatively, use the space between muffin cups in an upside-down muffin tin.
Bake for 6-8 minutes until the shells are crisp and lightly browned. Remove and let cool to crisp up further.
While the shells are baking, melt 2 tablespoons of butter in a medium saucepan over medium heat.
Add the diced apples, brown sugar, cinnamon, nutmeg, and cloves (if using). Stir to combine.
Add the lemon juice and cook the apple mixture for about 5 minutes, stirring occasionally, until the apples begin to soften but still maintain some texture.
Mix the cornstarch with water in a small bowl until smooth, then stir this slurry into the apple mixture. Continue cooking for 1-2 minutes until the mixture thickens.
Fill each cinnamon-sugar taco shell with the warm apple filling.
Top with a dollop of whipped cream and a drizzle of caramel sauce. Add a small scoop of vanilla ice cream and a sprinkle of chopped nuts if desired.
Serve immediately while the shells are still crisp and the filling is warm.