Preheat the oven to 175 degrees Celsius.
Add egg and sugar to a bowl. Whisk gently until combined, do not whisk too much.
Add yogurt/quark, applesauce and milk. Stir until combined.
Combine oat flour, cacao powder, baking powder and sea salt in a bowl. Sift into the batter, then stir just until combined.
Divide the brownie batter between silicon molds, filling them about 2/3 of the way up (this makes 4-8 popsicles depending on how large your molds are).
Bake in the oven for 12-16 minutes, depending on how big your molds are and how fudgy you prefer your brownies.
Remove from the oven, let them cool completely. Then place in the freezer.
Make the caramel sauce by adding cream, fiber syrup/agave/honey to a pot and bring to a boil. Lower the heat to medium, let the sauce cook until reduced and thickened. Stir every now and then to make sure it doesn't burn at the bottom of the pot. Remove from the heat and let it cool.
Remove the popsicles from the freezer, top each popsicle with salted caramel sauce. Place back into the freezer for 3-4 hours, or over night.
When the brownies and caramel sauce is set and frozen melt chocolate in a microwave or over a water bath.
Pour the melted chocolate into a high glass. Dip each popsicle in the melted chocolate. Drizzle excess chocolate over the popsicles and sprinkle with sea salt (if using).
Place back into the freezer for about 30 minutes.
Remove popsicles 5-15 minutes before serving, depending on if you prefer them frozen or softened.