Grate 2 ounces cheese on largest holes of a box grater to equal ½ cup.
Melt 1 tablespoon butter in a large, high-sided skillet over medium-high. Add marinara sauce and vodka; bring to a boil over medium-high, stirring often. Reduce heat to medium. Simmer, stirring occasionally, until scent of vodka has dissipated (or, if using wine or stock, until sauce has slightly thickened), 2 to 3 minutes.
Add gnocchi and increase heat to medium-high. Cook, stirring occasionally, until gnocchi is tender and sauce has thickened, about 4 minutes. Add cream; cook, stirring constantly, for 1 minute. Remove from heat. Stir in grated cheese, salt, and remaining 1 tablespoon butter.
Toss almonds, parsley, and lemon zest in a small bowl. Using a vegetable peeler, shave remaining 1 ounce cheese into parsley mixture; stir to combine. Sprinkle onto gnocchi.