Sponge Method Challah Bread - On Bread Alone

Ingredients

• All-purpose Flour - 1 cup (130 g)
• Warm Water - ½ cup (115 g) (~95 o F/35 o C)
• Instant Yeast - 1 tsp (8 g)
• All-purpose Flour - 1½ to 2 cups (195 g - 260 g)
• Sugar - 1 TBSP (13 g)
• Instant Yeast - 1¼ tsp (8 g)
• Fine Sea Salt - ½ tsp (3 g)
• Butter - 3 TBSP (45 mL) - softened or Olive Oil
• 2 Eggs + 1 Egg white
• 1 Egg yolk
• Water - 1 TBSP (15 mL)
• Poppy Seeds - optional
• Sesame Seeds - optional