Heat a skillet over medium to high heat. Then add the 4 cups of hulled sesame seeds and stir frequently until they are slightly golden. Be careful here as sesame seeds burn quite easily. Once they are roasted, set aside and let them cool at room temperature.
After about 15-20 minutes, add them to a food processor or place them in a bowl and use a hand held blender and give them a spin on high until it turns into a paste.
Add 3 tablespoons of olive oil and blend until you reach a creamy consistency.