Formula for a (reasonably healthy) salad
100g leafy greens: spinach, kale, Swiss chard, rocket, baby gem, romaine lettuce, green cabbage etc. The more hardy the leaf, the more inclined I am to shred it (eg kale)
85g soft vegetables or fruit: tomato, peas, artichokes, avocado, berries, onions (inc. spring onions), pickled or roasted vegetables
85g crunchy vegetables: carrots, celery, bell pepper, red cabbage, radishes, mange tout, cucumber, cauliflower, sprouts, broccoli
Add up to two proteins: steak, chicken, tuna, prawns, salmon, hard boiled eggs, nuts, seeds (I especially like dry pan fried pumpkin seeds or sesame seeds - again dry pan fried with a squirt of lemon juice and a teaspoon of soy sauce added at the end), chickpeas, cheese (feta, mozzarella balls, parmesan shavings) marinated tofu
85g complex carbohydrates: quinoa, barley, farro, brown rice, lentils, whole grain croutons.
Making different salad dressings is another way to add interest. Try using tahini, flavoured oils , different mustards and vinegars, add some honey or maple syrup or fresh herbs. Most salad dressings keep in a screw top jar in the fridge for a week or two.