How to Make It
Dissolve yeast in warm milk in the bowl of a stand mixer fitted with the paddle attachment; let stand 5 minutes. Add butter, honey, 2 eggs, chopped sage, and orange zest to milk mixture; beat at low speed 1 minute or until combined. Weigh or lightly spoon flours into dry measuring cups; level with a knife. Combine flours and salt in a bowl. Add half of flour mixture to milk mixture; beat at low speed until combined, scraping down sides of bowl with spatula as needed. Remove paddle attachment; insert dough hook. Add remaining half of flour mixture; beat at medium-low speed 4 minutes or until combined.
Turn dough out onto a lightly floured work surface; knead 5 minutes or until smooth. Place dough in a large bowl coated with cooking spray, turning to coat. Cover and let rise in a warm place (85°F), free from drafts, 1 hour and 15 minutes or until doubled in size. (Gently press 2 fingers into dough. If indentation remains, it has risen enough).
Turn dough out onto a lightly floured surface. Cut dough into 12 equal portions. Working with 1 portion at a time (cover remaining pieces to avoid drying), gently roll into a smooth ball. Place rolls in a 9-inch springform pan coated with cooking spray, leaving space between rolls. Cover and let rise 1 hour and 15 minutes or until almost doubled in size.
Preheat oven to 350°F.
Top each roll with a small sage leaf. Combine 2 teaspoons water and egg yolk in a bowl, stirring with a whisk. Brush rolls with egg mixture; discard remaining egg mixture. Bake 13 minutes or until golden. Place pan on a wire rack; cool 5 minutes. Remove sides from pan; cool completely.