Add 2 eggs, 1/2 tsp salt and 1 cup milk to blender. Mix briefly. Add 1 cup flour, mix again for 30 seconds. Scrape down the sides of the blender, mix again for 15-20 seconds or until all flour is incorporated. Distribute batter evenly in popover pan, filling each about 1/2 full. Bake for 40-45 minutes until puffed and browned. Remove from oven and immediately insert knife blade into side of popover near the top to vent steam. Serve with butter and jam.