Preheat oven to 350°F and line a baking sheet with parchment paper.
Spread pumpkin seeds in an even layer and bake until evenly toasted, about 15 minutes, stirring once or twice. Let cool 15 minutes.
Transfer cooled seeds to a food processor, add salt, and process until smooth, stopping to scrape down the sides of the bowl frequently, about 15 minutes.
Store chilled and let come to room temperature before using.
Yield 1-1/2 cups.