Combine flour, salt, and rosemary. Whisk together maple syrup and milk. Alternately add flour and milk to whisked eggs. Let rest in refrigerator for 20 minutes. Preheat oven to 400 degrees F. Lightly oil popover or muffin tins and place briefly in preheated oven. Remove hot tins from oven, fill two-thirds of each cup with batter, and top with shredded cheese. Bake for 20 to 30 minutes until golden brown. Serve immediately.