If you plan on making these sliders ahead of time, I recommend that you make the slider meaty filling as well as cooked bacon and grated cheese and store all of these ingredient components in separate airtight containers in the refrigerator for up to 2-3 days. On the day of serving your sliders, assemble all the stored ingredient components, glaze and bake to serve. You may also need to add 10 - 15 minutes to the cooking time because the ingredients will have been chilled.  Another way to make these sliders in advance is to completely assemble the sliders in the 9x13 tray without the melted butter, and then seal the tray with plastic wrap to store the sliders in the refrigerator the night before.