Place chickpeas (15 oz) into a mixing bowl.
Mash chickpeas using a fork until chunky.
Add 2 avocados, then mash until creamy.
Mix in celery (½ cup) and red onion (¼ cup).
Add lemon juice (1 tablespoon) and olive oil (1 tablespoon).
Stir in garlic powder (½ teaspoon), salt (½ teaspoon), and black pepper (¼ teaspoon).
Add dill (1 tablespoon) and Dijon mustard (1 teaspoon).
Stir until evenly combined.
Chill for 10 minutes before serving if desired.