Tahini is a paste made from ground sesame seed. One-half cup of sesame seed can be subbed for the tahini. The dip just won't be as smooth as if you'd used tahini.
Swirl the surface of the dip with the back of a spoon, drizzle with olive oil and sprinkle with cayenne for an inviting appetizer.
Add a signature touch—stir in 1/4 cup finely chopped sun-dried tomatoes for a punch of flavor and color.