I'm just being upfront because all seitan bacon is two-day "bacon". At the very least, you need to cook it twice and allow it to cool completely between applications of heat. Many wait overnight.
If you don't have that kind of time, I suggest my one-day rice paper bacon or tofu jerky to satisfy your savory cravings. But carve out time for this recipe when you can! It's versatile, and oh-so worth it.

In addition to slicing and baking strips of seitan bacon, you can dice it to flavor other dishes. I've used it to veganize pea and my neighbor's 15-bean soups with "ham" as well as Southern Living's succotash.
My review of 10 different vegan bacon recipes merely touches upon all the testing behind this formula.
To streamline your measuring, I marked ingredients that are used more than once with an asterisk (*).
makes 1, 9x5x1-in (23x13x2.5-cm) loaf
Preheat oven to 275°F/135°C. Gather 2 med mixing bowls, a whisk, 2 sm mixing bowls, a spatula, a cutting board, a chef’s knife, parchment paper, a 9x5-in (23x13-cm) loaf pan, foil, and pie weights (or 1 lb/454 g dried beans designated as pie weights).
Separately measure “fat” and “meat” dry bases into each of the med bowls. Thoroughly whisk “fat” dry base.
Into each of the sm bowls, separately measure “fat” and “meat” wet mixes. Thoroughly whisk both in that order.
Use spatula to stir “fat” wet mix into “fat” dry base to create a uniformly moistened “fat” dough. Set dough on cutting board and loosely cover with inverted mixing bowl.
Similarly, create a “meat” dough. Switch to kneading with hands in bowl 5 min before setting dough on cutting board and loosely covering with inverted bowl. Rest 10 min.
Uncover and cut “fat” dough into halves; “meat”, into ⅔ and ⅓ potions.
Tear a piece of parchment twice the dimensions of loaf pan. Center parchment over pan, and larger “meat” portion over parchment. Push and stretch dough against parchment-lined bottom to cover as much of it as possible.
Push and stretch a “fat” portion over the first (“meat”) layer. Then, proceed with the smaller “meat” and end with the other “fat” portion.
Tightly fold parchment to conceal “bacon” loaf. Tear a large piece of foil, then snug directly atop wrapped “bacon”. Secure with pie weights/dried beans. Seal foil up and over edges of pan, then bake 40 min.
Retrieve setup from oven. Allow everything to cool about 4 hrs, until room temperature, then refrigerate overnight.
Preheat oven to 375°F/190°C. Gather a wire rack, baking sheet, Santoku knife or mandoline, heatproof cup, and pastry brush. Set wire rack inside baking sheet.
If using, adjust mandoline blade for ⅛-in (3-mm) thick slices. Unwrap “bacon”. Carefully but firmly slide shorter edge against blade to produce desired number of strips. Alternatively, slice with a Santoku knife.
Evenly lay strips on wire rack, perpendicular to wires. Measure ½ tsp (5 mL/g) refined coconut oil per 4 strips into cup, then microwave in 10- to 20-sec intervals until melted. With pastry brush, coat both sides of each strip with melted oil.
Bake 10-12 min without flipping; cool 2 min before serving.
Gratitude is the most scrumptious seasoning!
Thank You ♥
From the Bottom of My Hearth, Christi of Does It Vegan?