Carefully collect dandelions from an area free of pesticides and pollutants. Pluck only the yellow petals from the green base. Discard all green parts as they are bitter. Aim for 1/2 cup packed petals.

In a small bowl, combine the warm milk, 1 teaspoon of granulated sugar, and active dry yeast. Stir gently and let sit for 5-10 minutes until foamy, indicating the yeast is active.

In a large mixing bowl (or the bowl of a stand mixer fitted with a dough hook), whisk together 3 cups of flour, the remaining 1/4 cup granulated sugar, and salt.

Add the proofed yeast mixture, melted butter, and egg to the dry ingredients. Mix on low speed (or with a wooden spoon) until a shaggy dough forms. Gradually add the dandelion petals and continue mixing until just combined.

If using a stand mixer, increase speed to medium-low and knead for 5-7 minutes, adding remaining flour 1 tablespoon at a time if the dough is too sticky, until the dough is smooth, elastic, and pulls away from the sides of the bowl. If kneading by hand, turn the dough out onto a lightly floured surface and knead for 8-10 minutes until smooth and elastic.

Lightly grease a clean large bowl with a little oil. Place the dough in the bowl, turning once to coat. Cover the bowl with plastic wrap or a clean kitchen towel and let rise in a warm, draft-free place for 1 to 1.5 hours, or until doubled in size.

Lightly grease a 9x5-inch loaf pan. Once the dough has doubled, gently punch it down to release the air. Turn it out onto a lightly floured surface and shape it into a loaf. Place the loaf seam-side down in the prepared pan.

Cover the loaf pan loosely with plastic wrap or a kitchen towel and let it rise again in a warm place for 30-45 minutes, or until it has nearly doubled in size and looks puffy.

Preheat your oven to 375°F (190°C) during the last 15 minutes of the second rise.

Bake the bread for 30-35 minutes, or until golden brown on top and a wooden skewer inserted into the center comes out clean. An instant-read thermometer should register 190-200°F (88-93°C).

Remove the bread from the oven and let it cool in the pan for 5-10 minutes before carefully transferring it to a wire rack to cool completely.

While the bread cools, prepare the glaze. In a small bowl, whisk together the powdered sugar, honey, 1 tablespoon of lemon juice, and optional lemon zest until smooth. If the glaze is too thick, add more lemon juice 1/2 teaspoon at a time until you reach your desired drizzling consistency.

Once the bread is mostly cool (or completely cool if you prefer a thicker, less absorbed glaze), drizzle the honey lemon glaze generously over the top. Let the glaze set for a few minutes before slicing and serving.