1Toss sliced zucchini with olive oil, salt, and pepper and roast in the air fryer or oven.
2Sauté onions in olive oil with garlic and lemon peel strips.
3Once the onions have cooked down, add some to a blender with beans, tofu, nutritional yeast, lemon juice, salt, and water, then blend until smooth and creamy.
4Add the sauce to a pan with the remaining butter beans.