In a mixing bowl of a stand mixer, add warm milk, yeast and honey. Stir briefly and let sit for 5 minutes allowing yeast to proof.
1 ½ cups whole milk, 2 ¼ teaspoons active dry yeast, 1 Tablespoon honey
Add potato water, mashed potatoes, oil and salt and 2 cups of flour. Stir until mixed together.
½ cup potato water, 2 Tablespoons canola oil, 1 teaspoon salt, 5 ½ - 6 cups all purpose flour
Continue adding flour 1 cup at a time, allowing all flour to be fully incorporated, until dough forms a ball and pulls away from the side of bowl. You might not need all the flour
Knead in mixer for 10 minutes.Remove from mixing bowl and form a ball
Place dough in a greased bowl and cover with plastic wrap
.Allow dough to double - approximately 1 ½ - 2 hours