At Chetek Lutheran Church, lefse-making day is part fundraiser, part living archive—and it has been for 35 years.Credit: Allrecipes / Sue Johnson / Julia Hartbeck / Getty Images“Lois, how many balls are left on your plate? Ready for a few more?” “I’ll take some cold flour when you have a chance.” “Gosh, isn’t the dough rolling out nicely this year?” I hear the work crews calling to each other before picking up the familiar scent of a Lutheran ch…