Flatbread with Shrimp and White Bean Hummus

Ingredients

• 1 teaspoon active yeast dry
• 0.3 teaspoon pepper black freshly ground
• 15 ounce beans white rinsed drained canned
• 3 cups flour all-purpose
• 1 teaspoon rosemary fresh finely chopped
• 5  to 6 garlic cloves unpeeled
• 0.8 cup micro greens mixed such as baby arugula
• 0.8 teaspoon kosher salt 
• 4  leeks light white green washed and cut into medium dice
• 1  optional: lemon halved lengthwise very thinly sliced
• 1.5 teaspoons juice of lemon fresh
• 1 tablespoon olive oil extra-virgin for brushing flatbread
• 2 medium onions spanish cut into medium dice
• 1.5 cups parmigiano-reggiano cheese finely grated
• 1 pound shrimp such as caribbean laughing bird sweet cooked peeled
• 1.5 teaspoons sugar 
• 1 tablespoon tahini 
• 2 teaspoons butter unsalted
• 1.3 cups warm water (105°F to 115°F)
• 2 tablespoons vinegar white

Equipment

• food processor
• bowl
• baking sheet
• sauce pan
• baking paper
• oven
• knife
• whisk
• wire rack
• plastic wrap
• aluminum foil
• stand mixer
• cutting board
• pasta machine
• pizza stone

Directions

1. In bowl of stand mixer fitted with paddle attachment, stir together water, yeast, and sugar until dissolved, about 5 seconds.
2. Let stand until foamy, about 5 minutes. In large bowl, whisk together flour and salt.
3. Add to yeast mixture and mix on low speed until just combined, about 30 seconds.
4. Add oil and mix on low speed until just combined, about 30 seconds. Switch to dough hook and mix on medium speed until dough is elastic and pulls away from sides, about 8 minutes. (Dough should feel firm and moist, but not sticky.)
5. Lightly oil large bowl. Gently shape dough into ball and transfer to bowl. Turn over several times to coat lightly with oil, then cover with plastic wrap and let rise in warm place (80°F to 85°F, see Chef's Notes) until doubled in size, about 1 hour.
6. While dough is rising, position rack near bottom of oven and top with pizza stone or heavy baking sheet. Preheat oven to 450°F for 1 hour.
7. Set smooth rollers of pasta machine on widest setting (see Chef's Notes). Divide dough into 6 equal parts. Cover 5 parts with plastic wrap. Shape remaining piece into rough rectangle and feed through rollers once to flatten into roughly 12-by 4-inch rectangle, approximately 1/8-inch thick.
8. Transfer flatbread to large baking sheet, dust with flour, and top with sheet of parchment paper.
9. Roll out remaining flatbreads in same manner, stacking between layers of parchment paper. Cover with plastic wrap until ready to bake.
10. Transfer 1 or more flatbreads to preheated pizza stone and bake in batches until slightly puffed but still pale, about 5 minutes.
11. Transfer to wire rack to cool completely. Leave oven on. DO AHEAD: Flatbreads can be prepared ahead and frozen, wrapped tightly in parchment paper and plastic wrap, up to 6 months.
12. Transfer garlic cloves to 6-inch square of foil, drizzle with 1 teaspoon olive oil, sprinkle with 1/8 teaspoon salt, and wrap tightly.
13. Bake until tender, about 45 minutes. Unwrap and let cool. DO AHEAD: Roasted garlic can be prepared ahead and refrigerated, in airtight container, up to 3 days.
14. Squeeze garlic cloves from skin into food processor.
15. Add white beans, remaining 2 teaspoons olive oil, vinegar, lemon juice, tahini, rosemary, and remaining 1 teaspoon salt and purée until smooth, about 2 minutes. DO AHEAD: Hummus can be prepared ahead and refrigerated in airtight container up to 3 days.
16. In large, heavy saucepan over moderately low heat, melt butter.
17. Add onions and sauté, stirring occasionally, until slightly transparent and starting to soften, about 2 minutes.
18. Add sugar and 4 teaspoons water and sauté, stirring occasionally, until golden brown, 12 minutes. Stir in salt and pepper, then transfer to medium bowl to cool. DO AHEAD: Onions can be prepared ahead and refrigerated, in airtight container, up to 3 days.
19. In large, heavy saucepan over moderate heat, heat olive oil.
20. Add leeks and sauté, stirring occasionally, until soft and translucent, about 8 minutes. Stir in salt and pepper, then transfer to medium bowl to cool. DO AHEAD: Leeks can be prepared ahead and refrigerated, in airtight container, up to 3 days.
21. Position rack near bottom of oven and top with pizza stone or heavy baking sheet. Preheat oven to 450°F for 1 hour.
22. Brush each flatbread with olive oil and spread with hummus. Scatter onions and leeks over and top with lemon slices and shrimp. Scatter with cheese, then sprinkle with salt and lemon juice.
23. Transfer 1 or more flatbreads to preheated pizza stone and bake in batches until toppings are warmed through and cheese has melted, 6 to 8 minutes.
24. Transfer flatbreads to large cutting board and top with micro greens. Using very sharp knife, cut into 6 thin slices and serve immediately.