PREHEAT OVEN TO 375°F.
COOK PASTA ACCORDING TO PACKAGE DIRECTIONS THEN DRAIN WELL.
IN A BOWL OR IN THE PASTA PAN, STIR TOGETHER PASTA SAUCE, COTTAGE CHEESE, SOUR CREAM, AND GARLIC. STIR IN PASTA, THEN STIR IN 2 CUPS OF SHREDDED CHEESE.
SPREAD PASTA IN A 9×13” BAKING DISH. SPRINKLE THE REMAINING 2 CUPS CHEESE ON TOP.
BAKE FOR 15-25 MINUTES OR UNTIL THE PASTA IS HOT ALL THE WAY THROUGH AND CHEESE IS MELTED. SERVE HOT. STORE IN AN AIRTIGHT CONTAINER FOR UP TO 3 DAYS.