In the bowl of a stand mixer, add yeast, 1 tablespoon sugar and warm water. Mix.
Add in 1 cup of flour then mix well. Cover and let rise 1 hour or until doubled in size.
Add milk to saucepan and heat to scalding (180℉). Then allow to cool to lukewarm (105-115℉).
Stir yeast sponge with paddle attachment then slowly add milk, melted butter, eggs and salt. Mix well.
Add remaining flour one cup at a time until soft dough forms. After about 4 cups, switch attachment to a dough hook.
Cover and let rise 1 hour or until doubled in size.
Prepare baking sheets by lining with parchment paper. Set aside.
Punch down dough, let rest for 5 minutes, then turn out on a lightly floured surface.
Roll dough to 1/2 inch thick rectangular shape. Cut into 24 rectangles.
Add a piece of sausage, 1/2 slice of cheese, and a strip or two of jalapeno to a dough piece. Fold over and seal tightly. Roll kolaches back and forth a little in your hands to shape into smooth oblong shape.
Place assembled kolaches on prepared baking sheets a couple of inches apart.
Once all are assembled, let rise one more time for about 45 minutes.
Heat oven to 400℉. Bake kolaches for 12-14 minutes or until light golden brown.