Mini Italian Frittatas

Name: Mini Italian Frittatas
Ingredients: 2 tablespoons good olive oil, plus extra for greasing the pans; 1 1/2 cups chopped leeks, white and light green parts, washed and spun dry; 4 ounces sliced Italian prosciutto, coarsely chopped; 8 ounces fresh baby spinach; 2 1/2 tablespoons julienned fresh basil leaves; 1 tablespoon freshly squeezed lemon juice; 1 1/2 cups (4 ounces) grated Italian Fontina cheese (6 ounces with rind); 8 extra-large eggs; 1 1/2 cups half-and-half; Kosher salt and freshly ground black pepper; 4 tablespoons freshly grated Parmesan cheese