Here’s a challah recipe that I have been tinkering with that takes something like 3 or 4 hours to rise to double in size. Am I doing something wrong?

3 tsp yeast

1/4 cup water

1/4 bread flour

This is mixed into a slurry, let sit 10 minutes.

4 cups flour

1/4 cup vital wheat gluten

1/4 cup flour (as needed)

1.5 tsp salt

4.5 oz honey

1/4 cup sugar

3.5 oz water

1/8 tsp vanilla

2 egg yolks

2 whole eggs

3 Tbl. oil

Any thought? Should I increase the yeast? Some other ingredient? I am already using osmotolerant yeast.

Thanks.