- 1 sourdough baguette
- 1/4 cup extra-virgin olive oil
- 2 large heads garlic
- a large piece Parmigiano-Reggiano (about 3/4 pound)
- two 10-ounce packages frozen peas, thawed
- 3 tablespoons water
- 2 teaspoons fresh lemon juice, or to taste
- 24 small arugula leaves
- Preheat oven to 400°F.
- Diagonally cut twenty-four 1/4-inch-thick slices from baguette with a serrated knife and arrange in one layer on a large baking sheet. Lightly brush tops of slices with about 1 tablespoon oil total and season with salt and pepper. Bake slices in middle of oven 5 minutes, or until golden, and transfer to a rack to cool.
- Separate garlic heads into cloves, discarding loose papery outer skin but keeping skin on cloves intact, and wrap together in foil, crimping seams to seal tightly. Roast garlic in middle of oven 30 minutes, or until soft. Unwrap garlic and cool slightly. Peel skin from each clove. Finely grate enough Parmigiano-Reggiano to measure 1/4 cup and chill remainder, wrapped in plastic wrap.
- In a saucepan cook peas in water, stirring, until just tender and heated through. In a food processor puree warm peas, garlic, grated cheese, lemon juice, 1 tablespoon oil, and salt and pepper to taste until smooth. Transfer puree to a bowl and cool completely. Puree may be made 1 day ahead and chilled, covered. Bring puree to room temperature before using and season with salt and pepper.
- With a vegetable peeler shave 24 thin slices from chilled Parmigiano-Reggiano. Spread about 1 heaping tablespoon puree on each toast and top with an arugula leaf and a Parmigiano-Reggiano shaving.
- Serve toasts drizzled with remaining oil.