Heat olive oil in a large skillet. Stir in shallot and green onions; cook and stir for 3 to 5 minutes, or until soft and fragrant. Stir in garbanzo beans, and season with salt and pepper; heat through. Place chard in pan, and cook until wilted. Add tomato slices, squeeze lemon juice over greens, and heat through. Plate, and season with salt and pepper to taste.
