In a food processor, combine beans, lemon juice, cumin, oregano and tomatoes and puree until smooth. Thin with a few tablespoons of water, if necessary, to get desired consistency. Season with salt and pepper. Spoon into a large shallow bowl and smooth with a spatula.
Stick carrot, celery sticks and sprouts around the edges of 1/2 of the bowl to make "hair". Use tomatoes, broccoli, and cauliflower to make a face.