In a small saucepan, combine the half-and-half, nutmeg, cloves, cinnamon stick, sage, thyme, and salt. Bring to a gentle simmer and let infuse for 10 minutes. Remove from the heat and allow to cool slightly.
Strain out the cloves, cinnamon stick, and herbs. Whisk in the beaten eggs until smooth.
Dip the tsoureki slices into the custard mixture, letting each slice soak for 1–2 minutes.
Melt 1–2 tablespoons of butter in a skillet over medium heat. Cook the soaked bread slices in batches (2–3 at a time) until golden brown on one side, then flip and cook until golden on the other.
Serve warm, topped with honey, walnuts, and blueberries.
Notes
You can use whole milk, low-fat milk, half-and-half, or heavy cream depending on your preference. Plant-based milk works too.
Slightly stale tsoureki makes the best French toast as it absorbs the custard without falling apart.
Nutritional info is an estimate and may vary based on products used.