Creamy Avocado–Horned Melon Dressing

Cut horned melon in half lengthwise; scoop out pulp. Place pulp in a fine sieve over a bowl. Press pulp with the back of a spoon to extract juice; discard juice. Place pulp and remaining ingredients in a blender or food processor; process until smooth. Store in an airtight container in the refrigerator up to 3 days.