Turn sourdough starter into this cheesy garlic sourdough focaccia. It's like having a giant sheet pan sized breadstick. It goes perfect with pasta, soup, and more.
In a large glass or plastic bowl, mix together 1½ cups fed sourdough, 1 cup warm water, ¼ cup olive oil, 1 cup all-purpose flour, and 1 Tablespoon honey. Allow to sit for at least a couple of hours but as long as overnight. It should be bubbly when it is ready to proceed.
Stir in ⅓ cup olive oil, 2 teaspoons salt and about 3½ cups of additional flour. Mix until well combined and start to knead on a floured surface. Slowly add flour a little at a time as necessary. The mixture should be soft and moist but not stick after 5-7 minutes of kneading.
Put dough in an oiled bowl. Cover and allow to rise for 1½-2 hours or until doubled in size. Punch the dough down and place in an oiled sheet pan.
Use your fingers to press the dough to the edges of the sheet pan. Cover with a damp towel and allow to rise for another hour.
Press your fingers randomly into the dough to create the trademark foccacia dimples. Gently brush with remaining 2 Tablespoons olive oil and sprinkle with 2 teaspoons garlic salt.
Bake at 450°F for 15 minutes. Remove bread from oven and sprinkle with 1½ cups shredded mozzarella and return to oven for 5-10 minutes more or until bread is done and cheese is lightly golden.
Cool then cut into pieces and serve. Store extras in an airtight bag.