Combine the avocado, garlic, and lemon juice in a food processor. With motor running, slowly add chickpea brine, stopping to scrape down the sides as necessary. Add between ¼ and ⅓ cup of liquid until the mixture is the consistency of mayonnaise. Add salt to taste.
Serve immediately.
Notes
Serving and Storing - Serve this vegan condiment immediately on your favorite sandwiches, burritos, or buddha bowls. Make only what you will be using. This mayo starts to brown quickly and doesn't store well.