Yes, Is Possible to Toast Sourdough bread. First Of all cut The Bread Into Thick Slices plenty with Olive Oil. Put on The Grill and Pressing down gutly Sothey Pick Grill Marks. Grill until Crispy and Toasted, about 40 Seconds per aside.If You want To Like toaster bread then the Right Toaster, Can Be Your Beat Friend. As per a sourdough Baker. If You Make toast bread but The Bread Isn’t Right A slice in a Toaster Can Help Bring It Up to Scratch.