I vary how it's seasoned.
Indian spices like turmeric, curry powder, garam masala, dried chilli, grated ginger, cumin, fresh coriander... go well with potato (I know it's not a vegetable), peppers, cauliflower, courgette, Aubergine
Italian seasoning (oregano, thyme, rosemary) goes well with tomatoes (I know it's a fruit), garlic, courgette, mushroom, aubergine...
Asian flavours (soy sauce, red Thai curry paste, oyster sauce) go with bean sprouts, shredded cabbage, spring greens, carrot, mushrooms, mangetout, peas, sweetcorn...
Other flavourings that are nice- Cajun, Jerk, Don't forget to check the supermarkets for different salad and stir fry veg combinations and the sauce aisle for ready made sauces for interest.