Spinach Sformatino With Pancetta Radishes And Spring Onions

Name: Spinach Sformatino With Pancetta, Radishes, And Spring Onions
Ingredients: Unsalted butter, for ramekins; 1 pound baby spinach, plus 16 leaves, for garnish; 5 large eggs; 1 1/2 cups fresh ricotta cheese; 1/4 cup freshly grated Parmigiano-Reggiano cheese; Coarse salt; Pinch of cayenne pepper; 1/4 teaspoon freshly ground black pepper; 1/4 teaspoon freshly grated nutmeg; 3 tablespoons extra-virgin olive oil; 1/4 cup 1-by-1/2-inch pieces pancetta (about 4 ounces); 1/2 cup medium morels, cleaned and halved if necessary; 1 spring or 8 pearl onions, trimmed and quartered; 1 clove garlic, sliced; 2 tablespoons sherry-wine vinegar; 4 radishes, trimmed and thinly sliced