Our glorious grain bowl calls for making the brown rice in advance, but even if you start from scratch, you can get the whole dish on the table in under an hour.
Combine tahini, lemon juice, and 2 to 3 tablespoons water (enough to create consistency of honey) until smooth; season with salt. Finely grate garlic on a Microplane; stir into sauce. Adjust seasoning as desired. Sauce can be stored in an airtight container in refrigerator up to 3 days.
In a large bowl, combine chickpeas, both beans, parsley, onion, celery, lemon juice, and oil. Season with salt and pepper. Bean salad can be made ahead and stored in an airtight container in refrigerator up to 3 days.
For each serving, place 3/4 cup cooked rice and 3/4 cup bean salad in a bowl; add some cabbage, avocados, roasted pepper, cucumber, and cress. Season with salt and pepper, drizzle with more oil, and squeeze a lemon wedge over it. Drizzle with tahini sauce; serve.
Look for beans in BPA-free cans -- or cook your own!