In a large mixing bowl, combine flour with salt. In a separate bowl, dissolve honey in warm milk and sprinkle over the yeast. Let stand 5 minutes until foamy.

Add the yeast mixture and olive oil to the flour. Mix until a shaggy dough forms, then knead for 8-10 minutes until smooth and elastic. Place in an oiled bowl, cover, and let rise in a warm place for 1 hour until doubled.

While dough rises, heat olive oil in a large skillet over medium-low heat. Add sliced onions and a pinch of salt. Cook slowly for 35-40 minutes, stirring occasionally, until onions are deeply golden and caramelized. Add thyme and black pepper. Let cool slightly.

Preheat oven to 425°F (220°C). Punch down the dough and roll it out on a floured surface into a 12x16 inch rectangle. Transfer to a greased baking sheet.

Spread the caramelized onions evenly over the dough, leaving a small border. Arrange anchovy fillets in a decorative lattice pattern across the top. Place olives in the centers of the diamond shapes created by the anchovies.

Drizzle with a little olive oil and bake for 20-25 minutes until the crust is golden brown and cooked through.

Remove from oven and let cool for 5 minutes. Cut into squares or rectangles and serve warm or at room temperature.