As a vegetarian, I have most of my vegetables as part of the main dish, so they are included and I don't have to think about "how to include them". Try it: invest in a very high quality vegetarian cookery book and start making three or four of the main meals for the week vegetarian ones with beans and pulses added rather than meat for protein and you'll never have to worry about it again! I make vegetarian lasagna, leek and lentil stew (with loads of carrots, red peppers and mushrooms in it), lentil, pepper and carrot soup with garlic and bean burritos with peppers and zuchinni, cauliflower cheese, on a regular basis. I add side dish of collards and tomatoes as salad all the time.
Clare