Welcome, my recommendations, get a stone, heat for 1 hr at max oven temp, your stone should get hotter than your oven max temp, if you have a top broiler in the main oven place your stone about 6-8 inches below the broiler , bake until bottom of pie is about 3/4 done then turn on broiler, if it won't fire open oven door a crack till it lights. Cook till done. You also can try lowering your hydration to 58-60%. If that doesn't work try another suggestion. You should get several here.