Pappardelle with Leeks, Sugar Snap Peas, and Lemon

INGREDIENTS

Lemons

1/2 lb

Sugar snap peas

3/4 lb

Pappardelle or other flat egg noodles, dried

Salt and freshly ground pepper, Coarse

1/2 stick

Butter, unsalted

2 oz

Pecorino romano cheese, grated

1/2 cup

Ricotta cheese, fresh

Medium leeks (white and pale-green parts only), cut into thin half-moons and rinsed well